微波和光学卫星数据融合用于恒河-布拉马普特拉河流域气象干旱监测

IF 2.8 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Kavita Kaushik, Arvind Chandra Pandey, Chandra Shekhar Dwivedi
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引用次数: 0

摘要

受气候变化的影响,恒河-布拉马普特拉河(GB)流域的气象干旱状况日益严重。针对印度,尤其是恒河流域的气象干旱,本研究探讨了微波综合干旱指数(MIDI)的有效性。研究分析了微波数据集与光学遥感数据相结合在 18 年(2003-2020 年)气象干旱评估中的应用。利用多个数据集(降水(Chips、Cmorph、Persann CDR、Persann CCS CDR)、温度(MODIS 陆地表面温度(LST))和土壤水分(Climate Change Initiative Soil MoistureCCISMv.02.2))及其组合计算了 10 月份的 MIDI。基于 MODIS 的增强植被指数(EVI)、标准化降水指数(SPI)和标准化降水蒸散指数(SPEI)计算了 1991 年至 2020 年的旱情,以了解之前的旱情并进行相关分析。根据 MIDI 对干旱状况进行分析后,恒河-布拉马普特拉河流域观测到的主要干旱年份为 2011-2012、2014-2015、2017-2018 和 2020 年。然后将多指标类比数据与 SPI、SPEI 和 EVI 相关联,发现多指标类比数据与 SPEI 的相关性最高(0.876),这强调了纳入多种环境因素以全面了解干旱动态的重要性。在雅鲁藏布江流域,基于 Chirps 降水的 MIDI 的相关性最高(从 0.87 到 0.83),而 MIDI CDR 和 CCS CDR 的相关性最低(分别为 0.29 和 0.37)。各种降水产品反映了它们在不同地形下的不同行为特征,可对其进行分析,以便更好地进行监测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Microwave and optical satellite data fusion for meteorological drought monitoring in the Ganga-Brahmaputra basin

Microwave and optical satellite data fusion for meteorological drought monitoring in the Ganga-Brahmaputra basin

The increased meteorological drought conditions are very prominent in the Ganga-Brahmaputra (GB) basin due to the impacts of climate change. In the context of meteorological drought in India, particularly within the GB basin, this study explores the effectiveness of the Microwave Integrated Drought Index (MIDI). The study analyses the use of microwave dataset combined with optical remote sensing data for meteorological drought assessment for 18 years (2003–2020). The MIDI was calculated for the month of October, using multiple datasets (Precipitation (Chips, Cmorph, Persiann CDR, Persiann CCS CDR), Temperature (MODIS Land Surface Temperature (LST)), and Soil Moisture (Climate Change Initiative Soil MoistureCCISMv.02.2)) and their ensemble. MODIS-based Enhanced Vegetation Index (EVI), Standardized Precipitation Index (SPI), and Standardized Precipitation Evapotranspiration Index (SPEI) were calculated from 1991 to 2020, to understand the previous conditions of drought as well as for correlation analysis. After the analysis of drought conditions based on MIDI, the major drought years observed in the Ganga-Brahmaputra basin were 2011–2012, 2014–2015, 2017–2018, and 2020. The MIDIs were then correlated with the SPI, SPEI, and EVI where the highest significant correlation was found between MIDI and SPEI (0.876), emphasizing the importance of incorporating diverse environmental factors for a comprehensive understanding of drought dynamics. The highest correlation was observed with Chirps precipitation-based MIDI (0.87 to 0.83) and the lowest with MIDI CDR and CCS CDR (0.29 and 0.37 respectively) specifically in the Brahmaputra basin. The various precipitation products reflected different characteristics in their behaviour for different topography that can be analyzed for better monitoring.

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来源期刊
Theoretical and Applied Climatology
Theoretical and Applied Climatology 地学-气象与大气科学
CiteScore
6.00
自引率
11.80%
发文量
376
审稿时长
4.3 months
期刊介绍: Theoretical and Applied Climatology covers the following topics: - climate modeling, climatic changes and climate forecasting, micro- to mesoclimate, applied meteorology as in agro- and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere - effects of anthropogenic and natural aerosols or gaseous trace constituents - hardware and software elements of meteorological measurements, including techniques of remote sensing
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