Impact of Historical Land Cover Changes on Land Surface Characteristics over the Indian Region Using Land Information System

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-07-05 DOI:10.1007/s00024-024-03523-y
Vibin Jose, Anantharaman Chandrasekar, Suraj Reddy Rodda
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Abstract

The present study has employed a regional Land Surface Model (LSM) to investigate the impact of historical land cover changes on land surface characteristics over the Indian subcontinent for the period of 1930–2013. Four simulations that include a control run and three experiment runs are performed with the Noah 3.6 LSM within the Land Information System (LIS). In the present study, the Noah LSM is driven by meteorological forcings, with radiation data obtained from the Global Data Assimilation System (GDAS) and the rainfall data obtained from IMD gridded rainfall data. The control run is performed with a MODIS-IGBP land cover map, while the three experimental runs are performed with three different potential land cover maps for the years 1930, 1975, and 2013. The potential land cover maps for the above three simulations are developed by blending the MODIS-IGBP data set with the fractional forest cover data set; the latter data is available for the years 1930, 1975, and 2013. Results indicate that the historical land cover change (1930 to 2013) has reduced the annual mean of latent heat flux and net surface heat flux over the Indian domain by \(-\)24.74 \(W/m^2\) and \(-\)14.18 \(W/m^2\) respectively, while the sensible heat flux and the soil temperature has increased by 4.97 \(W/m^2\) and 2.78 K. The annual mean change in latent heat flux, sensible heat flux, and soil temperature demonstrate that the largest changes occur when the land cover changes from forest to urban land as compared to forest to cropland, forest to grassland and forest to open shrubland. The annual mean change in latent heat flux is moderately large for the land cover change from forest to open shrubland when compared to forest to grassland and forest to cropland. The above is attributed to the effects of evapotranspiration, which has high values for the cropland followed by grassland and open shrubland. Furthermore, the triple collocation method is employed to assess the impact of historical land cover change on soil moisture. Results indicate that the triple collocation method effectively demonstrates the impact of land cover change on soil moisture.

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利用土地信息系统分析历史上土地覆盖变化对印度地区地表特征的影响
本研究采用区域地表模型(LSM)来研究 1930-2013 年期间印度次大陆历史土地覆被变化对地表特征的影响。利用土地信息系统(LIS)中的 Noah 3.6 LSM 进行了四次模拟,包括一次对照运行和三次实验运行。在本研究中,Noah LSM 由气象诱因驱动,辐射数据来自全球数据同化系统(GDAS),降雨数据来自 IMD 的网格降雨数据。对照运行使用的是 MODIS-IGBP 土地覆被图,而三次实验运行使用的是 1930 年、1975 年和 2013 年三种不同的潜在土地覆被图。上述三种模拟的潜在土地覆被图是通过将 MODIS-IGBP 数据集与部分森林覆被数据集混合绘制的;后者可提供 1930 年、1975 年和 2013 年的数据。结果表明,历史上的土地覆盖变化(1930 年至 2013 年)使印度地区的潜热通量和净表面热通量的年均值分别减少了 24.74 和 14.18,而显热通量和土壤温度则增加了 4.97 W/m^2。潜热通量、显热通量和土壤温度的年均变化表明,与森林到耕地、森林到草地和森林到开阔灌木地相比,当土地覆盖由森林变为城市土地时,变化最大。与森林到草地和森林到耕地相比,森林到开阔灌木林地的土地覆被变化引起的潜热通量年均值变化不大。这归因于蒸散作用的影响,耕地的蒸散值较高,其次是草地和开阔灌木地。此外,还采用了三重定位法来评估历史土地覆被变化对土壤水分的影响。结果表明,三重定位法有效地证明了土地覆被变化对土壤水分的影响。
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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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