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DOI | 10.1175/JCLI-D-18-0528.1 |
The Spatial Pattern of Midsummer Drought as a Possible Mechanistic Response to Lower-Tropospheric Easterlies over the Intra-Americas Seas | |
Maximiliano Zermeno-Diaz, David | |
2019-12-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:24页码:8687-8700 |
文章类型 | Article |
语种 | 英语 |
国家 | Mexico |
英文摘要 | Following the idea that large-scale wind perturbations cause repeatable rainfall patterns over small tropical islands, the spatial pattern of the midsummer drought (MSD) is investigated as a repeatable rainfall pattern over the Intra-Americas Seas (IAS). For that, statistical techniques, including linear regressions, canonical correlation analysis, and variance budgets, were applied to the Tropical Rainfall Measuring Mission and ERA-Interim datasets to assess 1) the MSD pattern repeatability and 2) its explained variance in different time scales. As shown by the results, the MSD pattern is not a unique feature of the boreal summer intraseasonal variability in the IAS: it is more robust during summer but it exists in all rainy seasons on daily, intraseasonal, and interannual time scales. On diurnal time scales, the MSD pattern explains a negligible part of the total variance during summer (<2%), but on interannual scales it explains up to 20% and it captures the spatial features of "El Nino" rainfall anomalies. On all time scales, the MSD pattern is accompanied by repeatable wind and pressure patterns: anomalous lower-tropospheric (925 hPa) easterlies over a domain-wide meridional northward pressure gradient. These results provide evidence for the hypothesis that the MSD pattern manifests an underlying geographically determined, mechanistic pattern. Also, they suggest that the repeatable MSD-shaped rainfall and wind patterns could be extrapolated in time to better understand the climatic conditions behind droughts and pluvials, and to diagnose the causes behind rainfall trends. |
英文关键词 | Climate variability Diurnal effects Intraseasonal variability Seasonal cycle Seasonal variability Tropical variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000499181600002 |
WOS关键词 | LOW-LEVEL JET ; SURFACE TEMPERATURE ; REGIONAL ASPECTS ; DIURNAL CYCLE ; PACIFIC ; PRECIPITATION ; VARIABILITY ; RAINFALL ; TRACKING ; CLIMATE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/225662 |
专题 | 环境与发展全球科技态势 |
作者单位 | Univ Nacl Autonoma Mexico, UNAM, Sch Philosophy & Letters, Dept Geog SUAyED, Mexico City, DF, Mexico |
推荐引用方式 GB/T 7714 | Maximiliano Zermeno-Diaz, David. The Spatial Pattern of Midsummer Drought as a Possible Mechanistic Response to Lower-Tropospheric Easterlies over the Intra-Americas Seas[J]. JOURNAL OF CLIMATE,2019,32(24):8687-8700. |
APA | Maximiliano Zermeno-Diaz, David.(2019).The Spatial Pattern of Midsummer Drought as a Possible Mechanistic Response to Lower-Tropospheric Easterlies over the Intra-Americas Seas.JOURNAL OF CLIMATE,32(24),8687-8700. |
MLA | Maximiliano Zermeno-Diaz, David."The Spatial Pattern of Midsummer Drought as a Possible Mechanistic Response to Lower-Tropospheric Easterlies over the Intra-Americas Seas".JOURNAL OF CLIMATE 32.24(2019):8687-8700. |
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