Satellite Based Temporal Analysis of Local Weather Elements along N–S Transect across Jharkhand, Bihar and Eastern Nepal

Proceedings

Pandey, Arvind Chandra¹  Mahto, Shanti Shwarup² 

[1] Author to whom correspondence should be addressed.;Centre for Land Resource Management, Central University of Jharkhand, Brambe, Ranchi-825205, India

关键词: climate change;    net solar radiation;    evapotranspiration;    temperature;    rainfall;    topography;    monsoon;   

DOI  :  10.3390/ecrs-2-05156

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The study shows the variation in the most important climatic variables i.e., Net Surface Radiation (Rn), Temperature, Rainfall, Evapotranspiration (ET), etc. during 2000–2016 along the North–South transect across Jharkhand, Bihar and Eastern Nepal. The Tropical Rainfall Measuring Mission (TRMM) monthly average precipitation (0.25° × 0.25°), Moderate Resolution Imaging Spectroradiometer (MODIS) 8 day average Land Surface Temperature (LST) product (1 km × 1 km), Modern-Era Retrospective analysis for Research and Applications, Version-2 (MERRA-2) radiation (0.5° × 0.625°) and Global Land Data Assimilation System (GLDAS) reanalysis model data (0.25° × 0.25°) have been used to study and analysed the spatial variability and distribution of rainfall, surface temperature, energy fluxes and evapotranspiration, respectively. The results have shown that the overall annual average rainfall has a gradual decreasing trend. Results have suggested that the regions with low rainfall (<1000 mm) have to witness warmer temperature conditions (>43 °C). The east–west central line of the Bihar, along the river Ganga is found to be the line of division for the comparatively higher (towards south) and lower (towards north) temperature zones. The results for Rn have shown an overall increasing trend over the period of time. Nepal has a wider stretch of Rn concluded by its mountain topography followed by the Jharkhand (plateau) and Bihar (plain). ET values have also shown an increasing trend and the results are noticeable for western Bihar-Jharkhand. There is an upward latitudinal shifting of the low rainfall bands in both the pre-monsoon and monsoon conditions. Due to the lack of availability of ground truth data, we have to restrict with the remotely sensed dataset only.

【 授权许可】

CC BY