An assessment of potential climate impact during 1948–2010 using historical land use land cover change maps
An assessment of potential climate impact during 1948–2010 using historical land use land cover change maps
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使用历史土地利用土地覆盖变化图评估 1948 年至 2010 年期间的潜在气候影响
DOI：
10.1002/joc.6621
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Xue, Yongkang
中科院分区：
文献类型：
--
作者：
Chilukoti, Nagaraju;Xue, Yongkang
早期的土地利用和土地覆盖变化研究通常只使用特定的土地利用和土地覆盖变化图，没有年际变化。本文采用大气环流模式（AGCM）和陆面模式，利用1948 ~ 2010年的63 a LULCC年际变化图，研究了LULCC对全球和区域气候的生物物理影响。开发了一种方法，将最近开发的具有1°× 1°分辨率的LULCC分数图转换为只允许一种主导类型的AGCM网格点。综合评价，确保不同区域原始LULCC分数变化趋势与网格点分数变化趋势一致。该模型与潜在植被图（CTL）和带LULCC的潜在植被图相结合，其中叶面积指数、反照率等地表参数随年际变化而变化。结果表明，与对照模拟相比，LULCC年际地图模拟能更好地再现地表温度和降水的年际变化。LULCC对全球降水产生负面影响，东亚、西非和南美等退化地区的显著信号最强，其中一些变化与观测到的特定时间段的区域异常相一致。LULCC造成净辐射和蒸散发的减少，从而导致季风环流的变化以及水汽通量辐合的大小和模式的变化，从而导致降水的减少。同时，由于蒸发蒸腾量的大幅减少，LULCC区域夏季地表增温增强。与地表相反，由于释放到对流层上层的潜热较少，导致LULCC区域的环流较弱，因此对流层上层温度较低。
Earlier studies of land use land cover change (LULCC) normally used only a specified LULCC map with no interannual variations. In this study, using an Atmospheric General Circulation Model (AGCM) coupled with a land surface model, biophysical impacts of LULCC on global and regional climate are investigated by using a LULCC map which covers 63 years from 1948 to 2010 with interannual variation. A methodology has been developed to convert a recently developed LULCC fraction map with 1° × 1° resolution to the AGCM grid points in which only one dominant type is allowed. Comprehensive evaluations are conducted to ensure consistency of the trend of the original LULCC fraction change and the trend of the fraction of grid point changes over different regions. The model was integrated with a potential vegetation map (CTL) and the map with LULCC, in which a set of surface parameters such as leaf area index, albedo and other soil and vegetation parameters were accordingly changed with interannual variation. The results indicate that the interannual LULCC map simulation is able to reproduce better interannual variability of surface temperature and rainfall when compared to the control simulation. LULCC causes negative effect on global precipitation, with the strongest significant signals over degraded regions such as East Asia, West Africa and South America, and some of these changes are consistent with observed regional anomalies for certain time periods. LULCC causes reduction in net radiation and evapotranspiration which leads to changes in monsoon circulation and variation in magnitude and pattern of moisture flux convergence and subsequent reduction in precipitation. Meanwhile, LULCC enhances surface warming during the summer in the LULCC regions due to greatly reduced evapotranspiration. In contradiction to the surface, upper troposphere temperatures are cool because of less latent heat released into the upper troposphere, which leads to weaker circulation in LULCC regions.
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观测到的植被年际变化的反馈：西非季风的区域气候模型分析
影响因子：
4.6
作者：
C. Klein;J. Bliefernicht;D. Heinzeller;U. Gessner;I. Klein;H. Kunstmann
通讯作者：
H. Kunstmann
影响因子：
3.1
作者：
X. Zhan;Y. Xue;G. Collatz
通讯作者：
X. Zhan;Y. Xue;G. Collatz
影响因子：
2.9
作者：
Peitao Peng;A. Barnston;Arun Kumar
通讯作者：
Peitao Peng;A. Barnston;Arun Kumar
全球和萨赫勒区域生物物理过程、植被动态和气候相互作用
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
G. Song
通讯作者：
G. Song
影响因子：
4.6
作者：
Huang, Huilin;Gu, Yu;Zhao, Bin
通讯作者：
Zhao, Bin