Vegetation Responses to 2012–2016 Drought in Northern and Southern California
Vegetation Responses to 2012–2016 Drought in Northern and Southern California
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DOI：
10.1029/2019gl082137
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发表时间：
2019-04
影响因子：
5.2
通讯作者：
C. Dong;G. MacDonald;K. Willis;T. Gillespie;G. Okin;A. P. Williams
中科院分区：
文献类型：
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作者：
C. Dong;G. MacDonald;K. Willis;T. Gillespie;G. Okin;A. P. Williams
2012年至2016年加州持续的干旱引发了许多问题，包括对植被健康状况下降的担忧。由于受太平洋影响的气候偶极子，水文气候变率的地理差异使干旱影响复杂化。对2000年至2018年MODIS衍生的归一化差异植被指数和自校准帕尔默干旱严重程度指数的分析揭示了北加州与南加州（北加州与南加州，参见定义部分）干旱和植被响应的差异。归一化植被指数下降幅度最大的地区集中在南加州，而北加州迄今为止受影响不大。结果表明，社会地区的干旱强度和植被对干旱的敏感性都较大。社会干旱的加剧是一个贯穿过去和现在的世纪的趋势。水文气候学和植被响应的空间差异是全州气候变化适应的重要考虑因素，社会可能面临更大的挑战。
The prolonged 2012–2016 California drought has raised many issues including concerns over reduced vegetation health. Drought impacts are complicated by geographical differences in hydroclimatic variability due to a climatic dipole influenced by the Pacific. Analysis of MODIS‐derived Normalized Difference Vegetation Index and self‐calibrated Palmer Drought Severity Index from 2000 to 2018 reveals differences in drought and vegetation responses in Northern versus Southern California (NorCal vs SoCal, see definition in section ). The greatest declines in Normalized Difference Vegetation Index were focused in the SoCal, while NorCal appears not severely affected thus far. It appears that both the strength of drought and the sensitivity of the vegetation to drought are larger in SoCal. The exacerbated aridity in SoCal is a trend extending throughout the past and present century. The spatial differences in hydroclimatology and vegetation responses are important considerations for statewide climate change adaptation—with SoCal potentially facing greater challenges.