Monsoonal moisture sources revealed using temperature, precipitation, and precipitation stable isotope timeseries
Monsoonal moisture sources revealed using temperature, precipitation, and precipitation stable isotope timeseries
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使用温度、降水和降水稳定同位素时间序列揭示季风水分源
DOI：
10.1029/2000gl012094
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发表时间：
2001
影响因子：
5.2
通讯作者：
C. Eastoe
中科院分区：
文献类型：
--
作者：
W. Wright;A. Long;A. Comrie;S. Leavitt;Tereza Cavazos;C. Eastoe
利用亚利桑那州图森市7月至8月降水的平均温度、降水量和稳定同位素时间序列的分析结果揭示了与美国西南部北美季风有关的大气环流模式。同位素时间序列与图森气温和降水量相关显著。温度和同位素时间序列也与区域和区域外的比湿显著相关，并与墨西哥海岸附近的东太平洋SST相关，这是1983-1999年期间主要是太平洋/加州湾夏季水分来源的证据。将区域外风矢量数据集分成与稳定同位素时间序列（通常是图森季节温度平均值中的极端年份）的图森7月至8月降水季节平均值的相对同位素耗尽或富集相匹配的年份组，表明在较冷/同位素耗尽的年份中夹带更多热带水分的环流模式，以及在较热/同位素富集的年份中夹带较少热带水分。
Results of analyses using timeseries of mean temperature, precipitation amount, and stable isotopes from precipitation from July–August in Tucson, Arizona, have revealed atmospheric circulation patterns related to the North American Monsoon in the U.S. Southwest. The isotope timeseries and Tucson air temperatures and precipitation amount are significantly correlated. The temperature and isotope timeseries also correlate significantly with regional and extra‐regional specific humidity, and with Eastern Pacific SSTs near the Mexican coast, evidence for a dominantly Pacific/Gulf of California summer moisture source for the period 1983–1999. Separation of extra‐regional wind vector datasets into groups of years matching relative isotopic depletion or enrichment of the Tucson July–August precipitation seasonal means for the stable isotope timeseries (usually the extreme years in the Tucson seasonal temperature means) suggest circulation patterns entraining more tropical moisture in cooler/isotopically depleted years, and entraining less tropical moisture in hotter/isotopically enriched years.