Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD027380 |
Seasonal and ENSO Influences on the Stable Isotopic Composition of Galapagos Precipitation | |
Martin, N. J.1; Conroy, J. L.1,2; Noone, D.3; Cobb, K. M.4; Konecky, B. L.5; Rea, S.6 | |
2018-01-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:1页码:261-275 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Ecuador |
英文摘要 | The origin of stable isotopic variability in precipitation over time and space is critical to the interpretation of stable isotope-based paleoclimate proxies. In the eastern equatorial Pacific, modern stable isotope measurements in precipitation (delta O-18(p) and delta D-p) are sparse and largely unevaluated in the literature, although insights from such analyses would benefit the interpretations of several regional isotope-based paleoclimate records. Here we present a new 3.5 year record of daily-resolved delta O-18(p) and delta D-p from Santa Cruz, Galapagos. With a prior 13 year record of monthly delta O-18(p) and delta D-p from the island, these new data reveal controls on the stable isotopic composition of regional precipitation on event to interannual time scales. Overall, we find Galapagos delta O-18(p) is significantly correlated with precipitation amount on daily and monthly time scales. The majority of Galapagos rain events are drizzle, or garua, derived from local marine boundary layer vapor, with corresponding high delta O-18(p) values due to the local source and increased evaporation and equilibration of smaller drops with boundary layer vapor. On monthly time scales, only precipitation in very strong, warm season El Nino months has substantially lower delta O-18(p) values, as the sea surface temperature threshold for deep convection (28 degrees C) is only surpassed at these times. The 2015/2016 El Nino event did not produce strong precipitation or delta O-18(p) anomalies due to the short period of warm SST anomalies, which did not extend into the peak of the warm season. Eastern Pacific proxy isotope records may be biased toward periods of high rainfall during strong to very strong El Nino events. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423433500015 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; EL-NINO ; DEUTERIUM EXCESS ; WATER-VAPOR ; EQUATORIAL PACIFIC ; D/H RATIOS ; VARIABILITY ; CONVECTION ; EXCHANGE ; RECORD |
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/32662 |
专题 | 气候变化 |
作者单位 | 1.Univ Illinois, Dept Geog, Urbana, IL 61801 USA; 2.Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA; 3.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA; 4.Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA; 5.Univ Colorado Boulder, Cooperat Inst Res Environm Sci, Boulder, CO USA; 6.Charles Darwin Res Stn, Galapagos, Ecuador |
推荐引用方式 GB/T 7714 | Martin, N. J.,Conroy, J. L.,Noone, D.,et al. Seasonal and ENSO Influences on the Stable Isotopic Composition of Galapagos Precipitation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(1):261-275. |
APA | Martin, N. J.,Conroy, J. L.,Noone, D.,Cobb, K. M.,Konecky, B. L.,&Rea, S..(2018).Seasonal and ENSO Influences on the Stable Isotopic Composition of Galapagos Precipitation.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(1),261-275. |
MLA | Martin, N. J.,et al."Seasonal and ENSO Influences on the Stable Isotopic Composition of Galapagos Precipitation".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.1(2018):261-275. |
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