globalchange  > 气候变化事实与影响
DOI: 10.3390/rs11080971
WOS记录号: WOS:000467646800081
论文题名:
Heat and Drought Stress Advanced Global Wheat Harvest Timing from 1981-2014
作者: Ren, Shilong; Qin, Qiming; Ren, Huazhong; Sui, Juan; Zhang, Yao
通讯作者: Qin, Qiming
刊名: REMOTE SENSING
ISSN: 2072-4292
出版年: 2019
卷: 11, 期:8
语种: 英语
英文关键词: wheat phenology ; spatiotemporal pattern ; climate change ; growing degree days ; water deficit
WOS关键词: CLIMATE-CHANGE ; WINTER-WHEAT ; VEGETATION PHENOLOGY ; TEMPERATURE ; TRENDS ; FEEDBACKS ; CULTIVARS ; RESPONSES ; GROWTH ; CROPS
WOS学科分类: Remote Sensing
WOS研究方向: Remote Sensing
英文摘要:

Studying wheat phenology can greatly enhance our understanding of how wheat growth responds to climate change, and guide us to reasonably confront its influence. However, comprehensive global-scale wheat phenology-climate analysis is still lacking. In this study, we extracted the wheat harvest date (WHD) from 1981-2014 from satellite data using threshold-, logistic-, and shape-based methods. Then, we analyzed the effects of heat and drought stress on WHD based on gridded daily temperature and monthly drought data (the Palmer drought severity index (PDSI) and the standardized precipitation evapotranspiration index (SPEI)) over global wheat-growing areas. The results show that WHD was generally delayed from the low to mid latitudes. With respect to variation trends, we detected a significant advancement of WHD in 32.1% of the world's wheat-growing areas since 1981, with an average changing rate of -0.25 days/yr. A significant negative correlation was identified between WHD and the prior three months' normal-growing-degree-days across 50.4% of the study region, which implies that greater preseason effective temperature accumulation may cause WHD to occur earlier. Meanwhile, WHD was also found to be significantly and negatively correlated with the prior three months' extreme-growing-degree-days across only 9.6% of the study region (mainly located in northern South Asia and north Central-West Asia). The effects of extreme heat stress were weaker than those of normal thermal conditions. When extreme drought (measured by PDSI/SPEI) occurred in the current month, in the month prior to WHD, and in the second month prior to WHD, it forced WHD to advance by about 9.0/8.1 days, 13.8/12.2 days, and 10.8/5.3 days compared to normal conditions, respectively. In conclusion, we highlight the effects that heat and drought stress have on advancing wheat harvest timing, which should be a research focus under future climate change.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/134051
Appears in Collections:气候变化事实与影响

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作者单位: Peking Univ, Inst Remote Sensing & Geog Informat Syst, Sch Earth & Space Sci, Beijing 100871, Peoples R China

Recommended Citation:
Ren, Shilong,Qin, Qiming,Ren, Huazhong,et al. Heat and Drought Stress Advanced Global Wheat Harvest Timing from 1981-2014[J]. REMOTE SENSING,2019-01-01,11(8)
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