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... other international land boarders include Solomon Island, Vanuatu, and Fiji all to the South-east. Figure 1 shows the map of Papua New Guinea and its provinces where the rainfall and temperature data used in this work have been collected. ...
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Based on original 2017 survey data from sample coffee cooperatives in the Eastern Highlands Province of Papua New Guinea, we construct estimates and indicators for cooperative governance and then relate these measures to estimates of cooperatives productivity levels. We address the important issue of weather and the extent which the governance of c...
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... As shown in Figure 7 Advances in Meteorology analysis indicates a clear upward trajectory. Without intervention to address the current pace of climate change, the upward trends in both rainfall and temperature are expected to persist [30]. ...
Land surface temperature (LST) is a critical indicator variable in climate science. In this study, the variation of LST on the island of New Guinea during 2000 to 2019 was investigated using a cubic spline model and a multivariate regression model. The data were obtained from the National Aeronautics and Space Administration moderate resolution imaging spectroradiometer database. This study focused on 90 subregions with 105-pixels of latitude 90 kilometer apart. These subregions were categorized into 10 super-regions. The results showed that the mean change in LST for all 90 subregions was +0.086°C per decade with a confidence interval of (0.028, 0.144)oC. There were five super-regions with a significant mean LST change. LST increased significantly in the central-north, central-south of the island (super-regions B1, C1, and C2 with 0.117°C, 0.162°C, and 0.185°C, respectively) and the southern part of Papua New Guinea (super-region E2 with 0.217°C), whereas it decreased in the middle part of the Indonesian territories (A2 with −0.122°C). The results also showed that LST variation occurs at the subregional level. Climate change mitigation methods are critical for reducing temperature rise and limiting any negative effects on the region.
... A system with 5at.% of silver was investigated by using three different nonisoconversional models: Kissinger [12,13],Mahadevan [14], and Augis-Bennett [15], and three different isoconversional models: Vyzovkin [16,17], Kissinger-Akahira-Sunose [18], Ozawa-Flynn-Wall [19]. The Johnson-Mehl-Avrami model was used to detect the type of nucleation and crystal growth mechanism [20][21][22][23]. ...
The processes of glass-transition and crystallization of chalcogenide glass As40Se30Te30 with 5 at.% silver were analyzed using differential scanning calorimetry. The values of glass-transition temperatures and activation energy were determined. Two crystallization processes were also detected and three-dimensional growth. Using non-isoconversional models the activation energies for both processes amounted to 112(2) kJ/mol and 97(2) kJ/mol. Isoconversional models were used to track changes in activation energy. The presence of Te significantly affects the thermal parameters as well as the structure of the glass while the presence of Ag does not significantly change the degree of connectivity of the As40Se30Te30 glass matrix.
The region situated along the southern coast of Papua Island exhibits a considerable likelihood of upwelling, which is distinguished by higher amounts of chlorophyll-a concentration. The present study examined the variability of upwelling phenomena spanning a period of 25 years (1998-2022) through the utilization of satellite-derived data obtained from the Ocean-Colour Climate Change Initiative (OC-CCI). Apart from the chlorophyll-a concentration, the southern region of Papua exhibits a significant amount of suspended sediment contamination, as indicated by the observations of Rrs 555. Upon conducting EOF analysis during each season, it has been observed that there has been a significant rise in the levels of chlorophyll-a concentrations over the past several years in the northern region of the Arafura Sea. The period spanning from 2016 to 2022 witnessed a rise in precipitation amounts, leading to a greater transportation of nutrients through water discharge and consequently resulting in an increase of chlorophyll-a concentration.
