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应用生态学报 ›› 2016, Vol. 27 ›› Issue (5): 1603-1610.doi: 10.13287/j.1001-9332.201605.012

• 目次 • 上一篇    下一篇

基于实际蒸散构建的干旱指数在黄淮海地区的适用性

王 莹1, 吴荣军2,3, 郭照冰1*   

  1. 1南京信息工程大学环境与科学学院, 南京 210044;
    2南京信息工程大学应用气象学院, 南京 210044;
    3江苏省农业气象重点实验室, 南京 210044
  • 收稿日期:2015-08-10 出版日期:2016-05-18 发布日期:2016-05-18
  • 通讯作者: guocumt@nuist.edu.cn
  • 作者简介:王 莹,女,1991年生,硕士研究生. 主要从事农业气象灾害研究. E-mail: 494900718@qq.com
  • 基金资助:
    本文由中国气象局农业气象保障与应用技术重点实验室开放基金项目(AMF201305)、国家自然科学基金项目(41575110)和国家自然科学基金委员会-广东联合基金(二期)超级计算科学应用研究专项(nsfc2015_233)资助

Applicability of established drought index in Huang-Huai-Hai region based on actual evapotranspiration.

WANG Ying1, WU Rong-jun2,3, GUO Zhao-bing1*   

  1. 1School of Environmental Science and Engineering, Nanjing University of Information Science Technology, Nanjing 210044, China;
    2School of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing 210044, China;
    3Jiangsu Province Key Laboratory of Agricultural Meteorology, Nanjing 210044, China
  • Received:2015-08-10 Online:2016-05-18 Published:2016-05-18

摘要: 基于NOAH陆面模式模拟的实际蒸散产品,分析了2002—2010年黄淮海地区实际蒸散的时空分布特征.同时,结合MOD17潜在蒸散数据和MOD13 NDVI构建了2002—2010年的农业干旱指数——干旱敏感性指数(DSI),并以2002年1—12月为例,利用帕默尔干旱指数(PDSI)、冬小麦减产率以及实际旱情资料,分析了DSI在该地区干旱监测的适用性.结果表明: 黄淮海地区年均实际蒸散从西北向东南递增,最高值出现在研究区域东南部(800~900 mm),最低值出现在西北部(<300 mm);DSI、PDSI两种干旱指数的年际变化呈正相关(R2=0.61)和变化趋势的一致性,均在2002年达到最低(-0.61和-1.33),2003年最高(0.81和0.92),DSI与冬小麦减产率的相关性(R2=0.43)明显优于PDSI(R2=0.06),且表征干旱的空间分辨率较高,对区域农业干旱程度的判断和旱情的指示比较可靠.

关键词: 黄淮海地区, 农业干旱指数, 实际蒸散

Abstract: Based on the modeled products of actual evapotranspiration with NOAH land surface model, the temporal and spatial variations of actual evapotranspiration were analyzed for the Huang-Huai-Hai region in 2002-2010. In the meantime, the agricultural drought index, namely, drought severity index (DSI) was constructed, incorporated with products of MOD17 potential evapotranspiration and MOD13 NDVI. Furthermore, the applicability of established DSI in this region in the whole year of 2002 was investigated based on the Palmer drought severity index (PDSI), the yield reduction rate of winter wheat, and drought severity data. The results showed that the annual average actual evapotranspiration within the survey region increased from the northwest to the southeast, with the maximum of 800-900 mm in the southeast and the minimum less than 300 mm in the northwest. The DSI and PDSI had positive correlation (R2=0.61) and high concordance in change trend. They all got the low point (-0.61 and -1.33) in 2002 and reached the peak (0.81 and 0.92) in 2003. The correlation between DSI and yield reduction rate of winter wheat (R2=0.43) was more significant than that between PDSI and yield reduction rate of winter wheat (R2=0.06). So, the DSI reflected a high spatial resolution of drought pattern and could reflect the region agricultural drought severity and intensity more accurately.

Key words: Huang-Huai-Hai region., agricultural drought index, actual evapotranspiration