Xinping Zhang

Hunan Normal University · College of Resources and Environmental Science

Study region: From 2017 to 2019, xylem and leaf samples of Cinnamomum camphora were sampled and soil water samples at 0-100 cm depth were sampled 65 times simultaneously in a typical East Asian monsoon region. Study focus: The seasonal origin of plant and soil water from precipitation was inferred based on the stable isotope techniques, including t...

Convective/advective precipitation partitions refer to the divisions of precipitation that are either convective or advective in nature, relative to the total precipitation amount. These distinct partitions can have a significant influence on the stable isotope composition of precipitation. This study analyzed and compared the effect of precipitati...

Seasonal variation and influencing factors of river water isotopes were investigated in the Xiangjiang River basin located in the East Asian monsoon region. This investigation involved comprehensive sampling of daily precipitation and river water with a 5 d interval as well as observing hydrometeorological factors spanning 13 hydrological years fro...

In this study, temporal variations of pan evaporation (PE) and its optimal combination of controlling factors are investigated in the subregions of Yangtze River Basin (YRB) by using multiple wavelet coherence (MWC). For this purpose, the YRB is firstly divided into nine relatively homogeneous PE subregions by combining empirical orthogonal functio...

Seasonal variation and influencing factors of water isotopes were investigated in the Xiangjiang River basin, located in the East Asian monsoon region. This involved comprehensive sampling of precipitation and river water, as well as observing hydrometeorological factors spanning 13 hydrological years from January 2010 to December 2022. Key finding...

The transport of atmospheric water vapor plays a crucial role in the production of precipitation and the variation of precipitation isotopic composition ( δ ¹⁸ O p ). This study investigates three precipitation events with extremely depleted precipitation isotopes in the summer rainfall of the Adelaide, Australia. Using fundamental water vapor diag...

Water ages in plant transpiration reveal important processes of water dynamics in soil‐plant‐atmosphere continuum, which is regulated by water variability and availability in both precipitation inputs and root zone. However, the impacts of climate patterns and rooting depth on water age dynamics in transpiration are inadequately investigated. In th...

The stable oxygen isotope composition of precipitation (δ¹⁸Op) in southern China is considered as a valuable proxy of climatic conditions. However, their interpretations have been controversial. In this study, based on the observed and simulated data (isoGSM2) on oxygen isotope composition of precipitation, the linkage between summer precipitation...

Pressure on river water resources may increase continuously under global climate change and the increasing intensity of human activity, and the identification of river water sources is needed to maintain water resource sustainability. In this study, river water sources were studied using hydrochemical tracers (i.e. the major ions) and end‐member mi...

The study on precipitation isotope variation can potentially improve the understanding of weather processes, regional water cycle and paleoclimate reconstruction in the subtropical monsoon region. Based on the measured stable isotope composition in precipitation (δ18Op) and daily precipitation from January 2010 to December 2021 in Changsha of the s...

Root-zone water storage is a core component of many hydrological systems, and a critical variable influencing water transport in the soil-vegetation-atmosphere continuum and biogeochemical processes. However, the dynamics of water bypass and replenishment in root-zone during precipitation infiltration processes have been rarely investigated. Here w...

Transit times and the young water fraction (Fyw, the proportion of the water younger than a certain age threshold, τyw) can help characterize the hydrological behaviors within a catchment. Previous studies of water age have concentrated on individual catchment hydrological components, such as river water, groundwater, plant water or soil water, whi...

Hydrologic and isotope mass-balance models (MBMs) are useful tools for the simulation and quantitative interpretation of lake water δ¹⁸O (δL). Such studies of small, open lakes are important because δL may show large responses to weather-driven hydrological variability. A δL sequence was simulated for three-year and five-day interval data from Taoz...

Stable isotopes respond sensitively to environmental evolution and record it in different geological archives due to fractionation. The stable isotope composition of water ( δ O and δ D) has been widely applied in fields including hydrometeorology, weather diagnosis, and palaeoclimate reconstruction. In recent years, the stable oxygen isotope of pr...

The young water fraction (F yw ) can be reliably determined in heterogeneous river basins, and the seasonal origin index (SOI) can be used to determine the relative contributions of winter versus summer precipitation to runoff. F yw and SOI are also important descriptors of how a basin controls runoff generation and the transport of contaminants an...

In this study, a nonstationary standardized precipitation index (NSPI) is calculated by fitting precipitation data to the nonstationary gamma model with climate indices as covariates and compared with stationary standardized precipitation index (SSPI) in fitting observed precipitation and identifying meteorological droughts during 1964–2016 in the...

Long-term continuous monitoring of precipitation isotopes has great potential to advance our understanding of hydrometeorological processes that determine stable isotope variability in the monsoon regions. This study presents 4-yr daily precipitation isotopes from Yungui Plateau in southwestern China that are influenced by Indian summer monsoon and...

Solar radiation, driving land-atmosphere interactions and terrestrial carbon assimilation, varies both temporally and spatially due to surface gradient, slope aspect and vegetation shading. Here we present a double-shading transposition model (DST) for simulating temporal and spatial distribution of downwelling shortwave solar radiation. The DST mo...

Long-term continuous monitoring of precipitation isotopes has great potential to advance our understanding of mechanisms that determine stable isotope variability in hydrological processes of monsoon regions. This study presents a 4-year daily data set of precipitation isotopes from Yungui Plateau of southwest China, influenced by southwest monsoon...

Holocene δ 18 O records from various archives (ice cores, cave stalagmites, and peat sediments) from the Xinjiang region of northwestern China, in arid central Asia (ACA), are all derived ultimately from local precipitation δ 18 O (δ 18 O p). Nevertheless , they have been proposed as indicators of different climatic parameters, such as wetness and...

Stem water content (θ) is an important state variable in the soil-plant-atmosphere continuum (SPAC), and varies temporally and spatially in response to environmental factors and plant growth stages. However, it is difficult to measure θ distribution in living trees in a manner that is not destructive. In this study, temporal and spatial variations...

The hydrogen and oxygen stable isotopic (²H and ¹⁸O) tracer method has become an important means of studying water transfer between the atmosphere, rivers and lakes, soils, plants, and aquifers. We conducted a study of the variations of the stable isotopes of water, and the seasonal variations in water use of Cinnamomum camphora, in the soil-plant-...

The millennial- and centennial-scale variability of Holocene climate in arid central Asia (ACA) is poorly understood, due to the lack of high-resolution records, especially of temperature. We present a high-resolution (~45-yr) peat α-cellulose δ¹³C record spanning the last ~11,030 years from a well-dated peat core (ATM10-C7) from the Altai Mountain...

Since Professor Paul G. Jarvis proposed a scheme in 1976 that relates stomatal conductance with environmental variables, there have been numerous studies exploring the relationships for estimating transpiration (Ec). Vapor pressure deficit (D) and solar radiation (R) are dominant environmental factors influencing Ec, whilst air temperature (T) is d...

Based on previously reported monitoring results from the alpine Sahara sand peatland (SSP) in the southern Altai Mountains, and modern observational δ18Op data from the Altai area, the new SSP peat α-cellulose δ18O (δ18Ocell) record spanning the last ∼11,000 years is determined to be an indicator of winter temperature. The record shows a long-term...

Due to their effects on snow/ice melting in mountains and evaporation in basins, temperature variations are an important influence on the hydrological cycle and water resources in arid Central Asia (ACA). We present independently-dated peat brGDGTs-based MBT′/MBT′5ME records from an alpine Sahara sand peatland (SSP) in the southern Altai Mountains,...

Soil water deficit is considered the dominant environmental constraint for plant transpiration (and photosynthesis) under water-limited conditions. Proper representation of soil water stress is thus critical for sound performance of both process-based and empirical models for transpiration simulation (e.g., process-based BTA-ψ and empirical modifie...

In this study, trends of seasonal precipitation are investigated in subregions of Hunan Province in China over 1960–2013 by discrete wavelet transform (DWT) and Mann–Kendall (MK) tests. The main purpose of trend analysis is to detect the most dominant periodic components affecting the observed trends of seasonal precipitation in each subregion. For...

Understanding global soil moisture‐air temperature (θ‐Ta) coupling is needed to improve the representation of land‐atmosphere interactions in Earth system models. Most studies on θ‐Ta coupling have focused on hot extremes, where precipitation‐related indices and model‐derived soil moisture products are commonly used. In this study, global θ‐Ta coup...

We present the results of a 3‐year monitoring program of the stable isotope composition of lake water and precipitation at Taozi Lake, in the East Asian monsoon region of China. Our aims were to reveal the spatiotemporal pattern of variation of stable isotopes in a small closed‐basin lake and to quantitatively determine the impacts of precipitation...

Plant transpiration depends on environmental conditions, and soil water availability is its primary control under water deficit conditions. In this study, we improve a simplified process‐based model proposed by Buckley, Turnbull & Adams (2012) (hereafter "BTA") by including soil water potential (ψsoil) to explicitly represent the dependence of plan...

The results of analyses of the stable isotopes of oxygen in precipitation (δ¹⁸Op) are presented for every rainfall event from January 2010 to December 2017 in Changsha, south-central China. Our aims were to elucidate the variations of δ¹⁸Op on different timescales and to identify the main meteorological drivers of variations in the oxygen isotopic...

Ubiquitous cadmium (Cd) contamination in mine impacted paddy soil has been jeopardizing regional rice quality, which represents a dominant pathway of Cd exposure in populations depending on a rice diet. Two major aspects of mitigation, soil liming and Si fertilization, were integrated and investigated with a Ca-Si-rich composite mineral (CS) derive...

The spatiotemporal variations of seasonal precipitation extremes during 1963–2013 over China and the possible teleconnections with large‐scale ocean–atmosphere indices are investigated by using the rotated empirical orthogonal functions, cross‐correlation analysis and stepwise variable selection methods. Results show that northwest China experience...

Simulations and comparisons of the temporal variations of stable isotopes in precipitation by iAWBM are helpful to assess the applicability of model in different regions and to enhance our understanding of the variations of water stable isotopes in water cycle. Using the simulation data by the isotope enabled Atmospheric Water Balance Model (iAWBM)...

Continuous measurements were made of isotopic compositions in atmospheric water vapor (δv) and in atmospheric precipitation (δp) near the surface in the subtropical monsoon region (Changsha, China) from October 2014 to March 2017 to investigate the change characteristics of vapor isotopes and their interactions with precipitation isotopes. On a diu...

This study analyzed the relationships of monthly δ ¹⁸ O in precipitation at 29 GNIP stations in China with local meteorological variables including near-surface temperature, precipitation amount, atmospheric precipitable water, outgoing longwave radiation and wind speed at 500 hPa, as well as with the large-scale circulation indices consisting of s...

Perindopril is an effective and widely used antihypertensive drug. L-Norvaline is an important intermediate in the synthesis of perindopril, which is mainly produced using chemical synthesis, with low enantiomeric purity and adverse environmental impacts. This paper presents an environmental friendly method for producing high-purity L-norvaline bas...

Photosynthetic capacity and leaf life span generally determine how much carbon a plant assimilates during the growing season. Leaves of deciduous tree species start senescence in late season, but whether the senescent leaves still retain capacity of carbon assimilation remains a question. In this study, we investigated leaf phenology and photosynth...

In this study, variations of hydrogen and oxygen isotopes in water vapor near surface, their related meteorological parameters, and the interrelationship with stable precipitation isotopes were analyzed and compared based on the monitoring data in Changsha, Hunan, from October 2014 to October 2015. The results show that the stable isotopes in atmos...

Study region: Western suburb of Changsha, Hunan Province, the central southern China. Study focus: Plant transpiration plays a significant role in the terrestrial water cycle and is closely associated with ecosystem primary production. Summer drought in the study area poses a stress on plant water use and associated carbon assimilation in growing s...

We studied the impacts of Three Gorges Reservoir (TGR) on the sedimentation regimes in the downstream-linked two largest Chinese freshwater lakes, Lake Dongting and Lake Poyang. Our results indicate that up to 1.73 × 10⁹ t sediment was retained in TGR from June 2003 to December 2014. This resulted in a 145.9 × 10⁶ t yr⁻¹ decline in the suspended se...

In this study, the photosynthetic light response curves were measured for Liquidambar formosana during the leaf senescence from October to December in 2014. The measurements were simulated by a photosynthetic light response model (Ye model) and the conventional non-rectangular hyperbola model, in order to understand the photosynthetic capacity of s...

Transpiration, influenced by many environmental variables, is one of the important physiological activities for plants. The responses of transpiration to environmental factors (solar radiation, vapor pressure deficit and soil water potential) were examined for some tree species (Osmanthus fragrans, Cinnamomum camphora and Liquidambar formosana) ove...

The isotope enabled atmospheric water balance model is applied to examine the spatial and temporal variations of δ18O in precipitation, amount effect and meteoric water lines (MWL) under four scenarios with different fractionation nature and surface evaporation inputs. The experiments are conducted under the same weather forcing in the framework of...

The δD and δ18O values in precipitation have disciplinary variations, and they have close connections with meteorological parameters and moisture sources. Based on the continuously collected precipitation samples in Mengzi from Jan. 2009 to Dec. 2011, the reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF) and the Na...

The stable oxygen isotopic composition (δ18O) of different water bodies can provide valuable information for investigation of hydrological processes, and it is an effective natural tracer that can be used to characterize the moisture sources of precipitation. In this study, to analyze the influence of moisture sources and meteorological variables o...

Vegetation water use is closely related to its biophysical functioning and is often under stress from various environmental factors. However, commonly used root water uptake models only consider the stress from root zone moisture availability. There is a need to incorporate the stress from both the above-ground factors and root zone water condition...

Based on the monitored atmospheric water vapor stable isotopes and observed meteorological elements at Changsha during the period from November 12, 2014 to April 13, 2015, the variations of water vapor stable isotopes and the relationships between isotope ratios and temperature, absolute humidity, precipitation amount were analyzed in this paper. T...

Canopy stomatal conductance (gc) controls transpiration and photosynthesis processes. Thus, the simulation of gc and its environmental variation forms a significant component of many land surface models. A Jarvis-type model, which calculates gc from a reference value multiplied by scaling (or response) functions of influencing environmental variabl...

This research aimed to explore the effect of hydroxypropyl-β-cyclodextrin on the Androst-1,4-diene-3,17-dione (ADD) synthesis by Mycobacterium neoaurum JC-12. Differential proteins were separated and identified by two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization-time of flight-mass spectrometry (MALDI-TOF-M...

Hyperspectral imaging, an emerging analytical technology for quality and safety inspections of agricultural and sideline products, combines the advantages of digital image or computer vision with spectroscopy technology in the whole system. Hyperspectral imaging can simultaneously acquire both spatial and spectral information, which deliver chemica...

We constructed plasmid pMTac to overexpress 3-ketosteroid-Δ1-dehydrogenase (KSDD) in Mycobacterium neoaurum JC-12 for improving androst-1,4-diene-3,17-dione (ADD) production. To construct pMTac, pACE promoter on pMF41 was replaced by tac promoter, and then four recombinants were constructed, which were M. neoaurum JC-12/pMF41-gfp, M. neoaurum JC-12...

Interannual variability of the atmospheric CO2 accumulation is at a similar magnitude of decadal average CO2 accumulation in the atmosphere. Part of observed variability in the atmospheric CO2 can be interpreted by large-scale climate variability. Teleconnection between the atmospheric CO2 anomalous tendency and selected large-scale coupled oceanic...

Analysis of the variation characteristics of different water bodies is the basis of applying isotopic tracer technique in regional water cycle research. Based on the samples of atmospheric precipitation, surface water (river water) and groundwater (spring water and well water) in Changsha from January 2012 to December 2013, the study analyzed the v...

Unlabelled: Acetoin and 2,3-butanediol are widely used in the chemical and pharmaceutical industries. The enzyme, 2,3-butanediol dehydrogenase/acetoin reductase (2,3-BDH/AR), plays a significant role in the microbial production of acetoin and 2,3-butanediol by catalysing a reversible reaction between acetoin and 2,3-butanediol. To date, a 2,3-BDH...

Based on field-survey hydrological series in the Dongting Lake watershed from 1951 to 2011, the variations of lakebed sediment siltation/erosion (S/E) regimes of the Dongting Lake after the operation of the Three Gorges Reservoir (TGR) were analyzed. Significantly positive correlations were found between the flow rate from Zhicheng and the Three Ou...

In our previous study, a genetically engineered strain Bacillus subtilis RF1 was constructed for riboflavin production. To enhance riboflavin production, further genetic modification was required to operate on B. subtilis RF1. The sat gene encoded Streptothricin acetyltransferase was inserted into expression vector pMA5, and the recombinant plasmid...

Stable isotopes in precipitation, both liquid (rain) and solid (snow), can be suitable tracers for hydrological cycles because their concentrations reflect the cumulative record of physical phase changes. Distribution of stable isotopes in precipitation over High-Asian monsoon regions, including Yunnan Plateau is investigated. It has two noticeable...

Deuterium and oxygen-18 are common environmental tracers in water used to investigate hydrological processes such as evaporation, groundwater recharge, and to trace moisture source. In this study, we collected event precipitation from 2010-01-01 to 2011-02-28 at a site in Changsha, Yangtze River Basin to estimate the influence of moisture source an...

As an essential parameter in carbon cycle models, the photosynthetic optimal tempera-ture plays a key role in determining the model accuracy. Thus, it is of great importance to study the response of photosynthetic optimal temperature to changes in environmental temperature. In this study, photosynthetic temperature responses in leaves of Cinnamomum...

In this article, a rainfall forecasting model using monthly historical rainfall data and climate indices is developed by incorporating the multi-resolution analysis (MRA) and multiple linear regression (MLR) model. The monthly rainfall anomaly and large-scale climate index time series are decomposed using MRA into a certain number of component subs...

In this article, we present a simplified isotopic Atmospheric Water Balance Model (iAWBM), to simulate spatial distribution and temporal variations of δ18O in atmospheric vapour and in precipitation, and the correlations of δ18O in precipitation with precipitation amount and with temperature. This method overcomes deficiencies of the Global Network...

Efforts in the past two decades on air temperature mapping based on sparse monitoring networks reveal that algorithms based on multiple linear regressions with geographical and topographical parameters perform promisingly. In this study, a multiple-regression model, previously for precipitation characterization using autosearched orographic and atm...

In this study, isotopic compositions of monthly (Global Network of Isotopes in Precipitation), event, and intraevent rain samples are used to examine the relationship between precipitation deuterium excess, the type of synoptic weather systems, and associated moisture directions in a coastal area of South Australia. The results indicate that both s...

ABSTRACT Seasonal variation of stable isotopes in precipitation of Kathmandu Valley on the southern slope of Himalaya was carried out to understand the controlling mechanism of amount and temperature effect on the basis of one year stable isotope data from 2010 to 2011. Highly depleted isotope values in major rainy period are obtained just after th...

The spatial and temporal distributions of the stable isotopes such as HD16O (or 1H2H16O, or HDO) and H218O in atmospheric water vapor are related to evaporation in source places, vapor condensation during transport, and vapor convergence and divergence, and thus provide useful information for investigation and understanding of the global water cycl...

In this paper, we examine the performance of four isotope incorporated GCMs, i.e., ECHAM4 (University of Hamburg), HadCM3 (Hadley Centre), GISS E (Goddard Institute of Space Sciences), and MUGCM (Melbourne University), by comparing the model results with GNIP (Global Network of Isotopes in Precipitation) observations. The spatial distributions of m...

Using the isotope enabled ECHAM4, GISS E, HadCM3 and MUGCM GCMs, the spatial distribution of mean delta O-18 in precipitation, the mean seasonality (JJA-DJF) and the correlations of delta O-18 in precipitation with temperature and precipitation amount are analyzed. The simulation results reproduce well the stable isotopic features by the GNIP obser...

The variations of stable isotopes including deuterium excess d over south-west China are displayed, and the relationships of the stable isotopes in precipitation with temperature and humidity at different altitudes are also researched. Under the prevailing monsoon system, distinct seasonality for δ18O and d in precipitation are shown and the revers...

In this study, we simulated and analyzed the monthly variations of stable water isotopes in different reservoirs at Manaus, Brazil, using the Community Land Model (CLM) that incorporates stable isotopic effects as a diagnostic tool for understanding stable water isotopic processes, filling the observational data gaps and predicting hydrometeorologi...

The daily and monthly variations of stable water isotopes in different reservoirs at Manaus, Brazil, are simulated and inter-compared in an equilibrium year, using the Community Land Model (CLM) involving the stable isotopic effects as a diagnostic tool for an in-depth understanding of the hydrometeorological processes. On the daily scale, the δ18O...

The correlations of isotopic ratios in precipitation with temperature, air pressure and humidity at different altitudes, in southwest China, are analyzed. There appear marked negative correlations for the δ 18O in precipitation with precipitation amount, vapor pressure and atmospheric precipitable water (PW) at Mengzi, Simao and Tengchong stations...

This study analyzes the relationships of stable isotopes in precipitation with temperature, air pressure and humidity at different altitudes, and the potential influencing mechanisms of control factors on the stable isotopes in precipitation in Southwest China. There appear marked negative correlations of the δ 18O in precipitation with precipitati...

Under Rayleigh equilibrium condition, stable isotopic ratio in residual water increases with the decrease of the residual water proportionf exponentially, and the fractionation rate of stable isotopes is inversely proportional to temperature. However, under kinetic evaporation condition, the fractionation of stable isotopes is not only related to t...

The humidity effect, namely the markedly positive correlation between the stable isotopic ratio in precipitation and the dew-point deficit ΔT d in the atmosphere, is put forward firstly and the relationships between the δ18O in precipitation and ΔT d are analyzed for the Ürümqi and Kunming stations, which have completely different climatic characte...

Three sampling cross-sections along the south path starting from the tropics through the vapor passage in the Yunnan-Guizhou Plateau to the middle and lower reaches of the Yangtze River, the north path from west China, via north China, to Japan under the westerlies and the plateau path from South Asia over the Himalayas to the northern Tibetan Plat...

The spatial and temporal variations of stable oxygen isotope in precipitation on different time scales are analyzed according to the data from the IAEA/WMO stations with long survey series in the Northern Hemisphere. Temperature effect is mainly distributed in mid-high latitudes on seasonal scale except for Bamako and Addisababa stations. The δ18O/...

The variations of the stable oxygen isotope in different water mediums in Urumqi River Basin, China, are analyzed. The stable oxygen isotope in precipitation has marked temperature effect either under synoptic or seasonal scale at the head of Urumqi River. The linear regression equations of δ18O against temperature are δ18O=0.94T-12.38 and δ18O=1.2...

The introduced mathematical model takes into account the role of the kinetic fractionation effect in a supersaturation environment at the ice surface as liquid and solid phases coexist in mixed cloud. Using the model, the temperature effect of stable isotopes in precipitation is simulated under different cooling conditions. The rate of change of δ...

There is no temperature effect in the southern Tibetan Plateau and South Asia to the south of the Tanggula Mountains. Amount effect has been observed at a few sampling stations accounting for about a half of the statistical stations. There is notable temperature effect in the middle and northern Tibetan Plateau and its adjacent Central Asia to the...

The variation of the δ18O in precipitation and the relationship with precipitation amount at Kyangjin Base House and Yala Glacier Camp in Langtang Valley, Nepal Himalayas were analyzed. The variations of the δ18O with precipitation had great scatter, and the correlations between the δ18O and precipitation changed with time on the synoptic scale. On...

The temporal and spatial variations of the δ18O in precipitation on the Tibetan Plateau are analyzed. There is no temperature effect in the southern Tibetan Plateau. Amount effect has been observed at Lhasa station. However, the seasonal variations of the δ18 in precipitation are different from that of precipitation intensity, showing that the prec...

The temporal and spatial variations of the δ18O in precipitation on the Tibetan Plateau are analyzed. There is no temperature effect in the southern Tibetan Plateau. Amount effect has been observed at Lhasa station. However, the seasonal variations of the δ18O in precipitation are different from that of precipitation intensity, showing that the pre...

There are marked positive relations between δ18O in precipitation and temperature at Tuotuohe, Delingha and Xining located on the Tibetan Plateau. The differences of dδ18O/dT among the three stations are notable on the synoptic scale. However, after eliminating the synoptic fluctuation, the differences of dδ18O/dT decrease. Contrary to current know...