Observed changes in summer thermal discomfort over Indian region during 1990–2020

Journal of Earth System Science, Journal Year: 2023, Volume and Issue: 132(1)

Published: Feb. 16, 2023

Language: Английский

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NPP and Carbon Emissions under Forest Fire Disturbance in Southwest and Northeast China from 2001 to 2020

Forests, Journal Year: 2023, Volume and Issue: 14(5), P. 999 - 999

Published: May 12, 2023

With climate change, frequent forest fires and prolonged fire period occur all over the world. Moreover, carbon emission from affects cycle of ecosystem. However, this effect varies by region with no uniform conclusions, fewer comparative studies exist on such differences between regions. In paper, net primary productivity (NPP) data MOD17A3 were used as an important parameter absorption, along MODIS spot MCD14DL burned area MCD64A1. Forest lost under interference in northeast southwest natural areas China was studied to explore role process its unlike regions China. Here, means kernel density analysis M-K trend test, characteristics China’s forests calculated. disturbance quantified reference factor list. We show that (1) total number spots 2001 2020 1.06 × 105, 1.28 times Northeast only 67.84% northeast. (2) The emissions 37,559.94 Gg, 10.77% larger than forest, CH4 CO2 13.52% 11.29% respectively. showed a downward trend, R2 = 0.16 (p < 0.1), while it remained basically unchanged southwest. contribution changed types, shown as: evergreen needleleaf (14.98%) > broadleaf (10.81%) deciduous (6.52%) (5.22%). (3) From 2020, premise NPP both manifested upward trends, significant 0.42 0.05), increased 0.37 0.05). It negative correlation emissions, had China, loss occurred Southwest general, different characteristics, NPP, which represents uptake, differences. impact study can provide some ideas effects change.

Language: Английский

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Comparison of Empirical ETo Relationships with ERA5-Land and In Situ Data in Greece

Geographies, Journal Year: 2023, Volume and Issue: 3(3), P. 499 - 521

Published: Aug. 3, 2023

Reference evapotranspiration (ETo) estimation is essential for water resources management. The present research compares four different ETo estimators based on reanalysis data (ERA5-Land) and in situ observations from three cultivation sites Greece. FAO56-Penman–Monteith (FAO-PM) compared to calculated the empirical methods of Copais, Valiantzas Hargreaves-Samani using both data. daily monthly biases each method are against FAO56-PM method. ERA5-Land also ground-truth observations. Additionally, a sensitivity analysis conducted site periods. finds that use underestimates ground-truth-based by 35%, approximately, when other methodologies shows underestimation with On contrary, Copais overestimation FAO56-PM, ranges 32–62% 24–56%, respectively. concludes solar radiation relative humidity most sensitive variables methodologies. Overall, methodology was found be efficient tool estimation. Finally, evaluation showed only air temperature inputs can utilized high levels confidence.

Language: Английский

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Analysis of the Spatiotemporal Trends of Standardized Drought Indices in Sicily Using ERA5-Land Reanalysis Data (1950–2023)

Water, Journal Year: 2024, Volume and Issue: 16(18), P. 2593 - 2593

Published: Sept. 13, 2024

In this study, a spatiotemporal analysis of drought occurrence and trends across Sicily using ERA50-Land continuous gridded data is carried out. We first use the Standardized Precipitation Index (SPI) Evapotranspiration (SPEI) to evaluate conditions at various time scales from 1950 2023. Then, Modified Mann–Kendall test was employed detect Sen’s slope estimator used quantify their magnitude. An historical series confirms that 2002 most severe year, impacting all short-term long-term. The spatial revealed western regions experienced highest severity frequency events. contrast, northeastern were less severely affected compared with other parts island. detects significant increasing in SPI values eastern coastal areas island, which are related possible increase precipitation. On hand, SPEI indicates decreasing part mainly increased evapotranspiration rates. These results partially consistent previous analyses future climate change scenarios, where changes island projected be way clearer than values.

Language: Английский

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Weather regimes and rainfall over Tunisia in a multi-model ensemble versus a multi-member ensemble

Climate Dynamics, Journal Year: 2023, Volume and Issue: 61(3-4), P. 1783 - 1813

Published: Jan. 12, 2023

Language: Английский

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