Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0425.1 |
Intraseasonal Variability of Summer Precipitation in Mexico: MJO Influence on the Midsummer Drought | |
Perdigon-Morales, Juliet1; Romero-Centeno, Rosario2; Barrett, Bradford S.3; Ordonez, Paulina2 | |
2019-04-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:8页码:2313-2327 |
文章类型 | Article |
语种 | 英语 |
国家 | Mexico; USA |
英文摘要 | The aim of this study is to understand how the Madden-Julian oscillation (MJO) modulates the bimodal seasonal rainfall distribution across the regions in Mexico where the midsummer drought (MSD) occurs. The MSD is characterized by a precipitation decrease in the middle of the rainy season. Relative frequencies of each active phase of the Real-time Multivariate MJO index were calculated at each grid point in the high-resolution Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) rainfall dataset for the first (MAX1) and second (MAX2) rainfall peaks and the MSD minimum (MIN). In addition, standardized anomalies of precipitation (from the CHIRPS dataset) and 300-hPa omega, 500-hPa geopotential height, and 850-hPa u- and upsilon-wind components (from the Climate Forecast System Reanalysis) were calculated for each MJO phase and each month in the rainy season. Results show that the MIN (MAX2) occurs more frequently during the dry (wet) MJO phases, while the MJO seems not to influence MAX1 significantly. Anomalous anticyclonic (cyclonic) circulations at 850 hPa, positive (negative) 500-hPa geopotential height anomalies, northeast (southwest) 850-hPa wind anomalies over southern Mexico, and a low-level westward (eastward) flow in the northeastern tropical Pacific support the MIN (MAX2) pattern under the influence of the dry (wet) MJO phases. These features are more clearly observed in the MSDs of 1- and 2-month duration and over the southern half of Mexico. The results suggest that the bimodal distribution is less influenced by the MJO in regions of northeastern Mexico. |
英文关键词 | Climate variability Climatology Intraseasonal variability Oscillations Tropical variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000463599100001 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; LOW-LEVEL JET ; INTERANNUAL VARIABILITY ; MODULATION ; PACIFIC ; AMERICA ; CIRCULATION ; RAINFALL ; WINTER |
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/182146 |
专题 | 气候变化 |
作者单位 | 1.Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Posgrad Ciencias Tierra, Mexico City, DF, Mexico; 2.Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, Mexico; 3.US Naval Acad, Dept Oceanog, Annapolis, MD 21402 USA |
推荐引用方式 GB/T 7714 | Perdigon-Morales, Juliet,Romero-Centeno, Rosario,Barrett, Bradford S.,et al. Intraseasonal Variability of Summer Precipitation in Mexico: MJO Influence on the Midsummer Drought[J]. JOURNAL OF CLIMATE,2019,32(8):2313-2327. |
APA | Perdigon-Morales, Juliet,Romero-Centeno, Rosario,Barrett, Bradford S.,&Ordonez, Paulina.(2019).Intraseasonal Variability of Summer Precipitation in Mexico: MJO Influence on the Midsummer Drought.JOURNAL OF CLIMATE,32(8),2313-2327. |
MLA | Perdigon-Morales, Juliet,et al."Intraseasonal Variability of Summer Precipitation in Mexico: MJO Influence on the Midsummer Drought".JOURNAL OF CLIMATE 32.8(2019):2313-2327. |
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