Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5364 |
Analysing regional climate forcing on historical precipitation variability in Northeast Puerto Rico | |
Ramseyer, Craig A.1; Mote, Thomas L.2 | |
2018-04-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38页码:E224-E236 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The tropical forests of northeast Puerto Rico (NE PR) and the Luquillo Mountains (LM) are a large repository for biodiversity and have an important role in regional biogeochemical processes. Precipitation is a key driver of the productivity of these sensitive ecosystems. This study analyses historical precipitation variability from 1985 to 2014 at El Verde Field Station (EVFS) at 380m on the north facing slope of the LM. The primary objective of this study is to identify atmospheric states that lead to extreme wet/dry conditions at EVFS. This study also investigates how those wet/dry atmospheric states change over the study period through an epoch approach on annual and seasonal timescales. Self-organizing maps (SOMs) are used to produce atmospheric states from ERA-Interim low-tropospheric moisture and circulation variables. These atmospheric states are downscaled to precipitation at the EVFS rain gauge. A probability density function of observed precipitation is calculated for each atmospheric state. Changes in node frequency, which is the number of days mapping to a particular node compared to the total number of days in the temporal period, are used to evaluate changes in wet/dry atmospheric states at EVFS. Results indicate that low-precipitation days at EVFS are associated with atmospheric states with high 1000-700hPa bulk wind shear and decreased 700hPa moisture. Wet days in the study region are associated with moist low-tropospheric environments with low wind shear. Our results indicate an increased frequency of dry season atmospheric states with lower 700hPa moisture. Over the study period, the dry season has a decrease in median and extreme precipitation during rainy days (days >0mm). A decrease in early rainfall season median precipitation on rainy days is observed despite an increase in days with measurable precipitation, likely driven by an increase in light rainfall days (<5mm). |
英文关键词 | precipitation variability self-organizing maps Northeast Puerto Rico climate downscaling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000431999600016 |
WOS关键词 | SELF-ORGANIZING MAPS ; MIDSUMMER DROUGHT ; CARIBBEAN RAINFALL ; SURFACE MELT ; ATLANTIC ; 20TH-CENTURY ; OSCILLATION ; CIRCULATION ; PERFORMANCE ; ISLAND |
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/37189 |
专题 | 气候变化 |
作者单位 | 1.Salisbury Univ, Dept Geog & Geosci, 1101 Camden Ave, Salisbury, MD 21801 USA; 2.Univ Georgia, Dept Geog, Climatol Res Lab, Athens, GA 30602 USA |
推荐引用方式 GB/T 7714 | Ramseyer, Craig A.,Mote, Thomas L.. Analysing regional climate forcing on historical precipitation variability in Northeast Puerto Rico[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38:E224-E236. |
APA | Ramseyer, Craig A.,&Mote, Thomas L..(2018).Analysing regional climate forcing on historical precipitation variability in Northeast Puerto Rico.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38,E224-E236. |
MLA | Ramseyer, Craig A.,et al."Analysing regional climate forcing on historical precipitation variability in Northeast Puerto Rico".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38(2018):E224-E236. |
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