Diurnal cycle of rainfall and surface salinity in the western Pacific warm pool

被引:34
作者
Cronin, MF [1 ]
McPhaden, MJ [1 ]
机构
[1] NOAA, Pacific Marine Environm Lab, Seattle, WA 98115 USA
关键词
D O I
10.1029/1999GL010504
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The diurnal cycles of rainfall and surface salinity in the western equatorial Pacific were computed for the period August 1991-December 1994 using hourly data from the Tropical Atmosphere Ocean (TAO) mooring array enhanced for the Coupled Ocean Atmosphere Response Experiment (COARE). The analysis shows preferential rainfall during predawn hours. Nighttime mixing typically caused the predawn rainfall to mix downward into higher salinity subsurface waters. In contrast, afternoon rainfall, although weaker, generally produced a stable shallow layer of very low salinity. Consequently, sea surface salinity (SSS) exhibited a weak diurnal cycle, with anomalously low salinity in the late afternoon and anomalously high salinity at night. At 1 m depth, the SSS diurnal cycle anomalies were similar to 0.005 psu. Although nearly two orders of magnitude less than the SSS standard deviation for this region, the anomalies were significant at the 95% confidence level.
引用
收藏
页码:3465 / 3468
页数:4
相关论文
共 16 条
[1]   Diurnal variation and life-cycle of deep convective systems over the Tropical Pacific warm pool [J].
Chen, SS ;
Houze, RA .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 1997, 123 (538) :357-388
[2]  
CLARK NE, 1974, SSRF682 NOAA NMFS
[3]   Upper ocean salinity balance in the western equatorial Pacific [J].
Cronin, MF ;
McPhaden, MJ .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1998, 103 (C12) :27567-27587
[4]   The upper ocean heat balance in the western equatorial Pacific warm pool during September-December 1992 [J].
Cronin, MF ;
McPhaden, MJ .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1997, 102 (C4) :8533-8553
[5]   Cool-skin and warm-layer effects on sea surface temperature [J].
Fairall, CW ;
Bradley, EF ;
Godfrey, JS ;
Wick, GA ;
Edson, JB ;
Young, GS .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1996, 101 (C1) :1295-1308
[6]   Bulk parameterization of air-sea fluxes for Tropical Ocean Global Atmosphere Coupled Ocean Atmosphere Response Experiment [J].
Fairall, CW ;
Bradley, EF ;
Rogers, DP ;
Edson, JB ;
Young, GS .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1996, 101 (C2) :3747-3764
[7]  
Freitag H. P., 1999, PMEL115 NOAA ERL
[8]  
JANOWIAK JE, 1994, MON WEATHER REV, V122, P2296, DOI 10.1175/1520-0493(1994)122<2296:AEOTDC>2.0.CO
[9]  
2
[10]  
Lagerloef GaryS.E., 1995, OCEANOGRAPHY, V8, P44, DOI [DOI 10.5670/OCEANOG.1995.17, DOI 10.5670/OCEANOG]