Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0061.1 |
Diurnal Forcing and Phase Locking of Gravity Waves in the Maritime Continent | |
Ruppert, James H., Jr.1; Zhang, Fuqing | |
2019-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:9页码:2815-2835 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | An unfiltered zonal Hovmoller depiction of rainfall in the Maritime Continent (MC) reveals remarkable spatiotemporal continuity of zonally propagating disturbances with a diurnal period, which endure over multiple days and propagate faster than the individual convective storms they coupled with. This phenomenon and its sensitivity to the Madden-Julian oscillation (MJO) during the 2011/12 Dynamics of the MJO (DYNAMO) field campaign is examined here through a well-validated, convection-permitting model simulation conducted on a large domain. We find that these disturbances are zonally propagating diurnal gravity waves excited by vigorous nocturnal mesoscale convective systems over Sumatra and Borneo. These gravity waves are diurnally phase locked: their wavelength very closely matches the distance between these two islands (similar to 1500 km), while their particular zonal phase speed (similar to +/- 17 m s(-1)) allows them to propagate this distance in one diurnal cycle. We therefore hypothesize that these waves are amplified by resonant interaction due to diurnal phase locking. While these zonal gravity waves decouple from convection once beyond the MC, their divergent flow signature endures well across the Indian Ocean, provoking the notion that they may influence rainfall at far remote locations. The exact controls over this zonal phase speed remain uncertain; we note, however, that it is roughly consistent with diurnal offshore-propagating modes documented previously. Further study is required to tie this down, and more generally, to understand the sensitivity of these modes to background flow strength and the geography of the MC. |
英文关键词 | Maritime Continent Gravity waves Madden-Julian oscillation Mesoscale processes Diurnal effects Sea breezes |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000484500800001 |
WOS关键词 | NORTHWESTERN SOUTH-AMERICA ; GLOBAL CIRCUMNAVIGATING MODE ; WINTER MONSOON CONVECTION ; WARM-SEASON PRECIPITATION ; DATA ASSIMILATION ; LINEAR-THEORY ; NORTH BORNEO ; PART II ; CYCLE ; RAINFALL |
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/186800 |
专题 | 地球科学 |
作者单位 | 1.Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA; 2.Penn State Univ, Ctr Adv Data Assimilat & Predictabil Tech, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Ruppert, James H., Jr.,Zhang, Fuqing. Diurnal Forcing and Phase Locking of Gravity Waves in the Maritime Continent[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(9):2815-2835. |
APA | Ruppert, James H., Jr.,&Zhang, Fuqing.(2019).Diurnal Forcing and Phase Locking of Gravity Waves in the Maritime Continent.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(9),2815-2835. |
MLA | Ruppert, James H., Jr.,et al."Diurnal Forcing and Phase Locking of Gravity Waves in the Maritime Continent".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.9(2019):2815-2835. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论