The effect of rain on air-water gas exchange

被引:89
作者
Ho, DT
Bliven, LF
Wanninkhof, R
Schlosser, P
机构
[1] COLUMBIA UNIV, DEPT EARTH & ENVIRONM SCI, PALISADES, NY 10964 USA
[2] NASA, GODDARD SPACE FLIGHT CTR, LAB HYDROSPHER PROC, WALLOPS ISL, VA 23337 USA
[3] NOAA, ATLANTIC OCEANOG & METEOROL LAB, OCEAN CHEM DIV, MIAMI, FL 33149 USA
关键词
D O I
10.1034/j.1600-0889.49.issue2.3.x
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
The relationship between gas transfer velocity and rain rate was investigated at NASA's Rain-Sea Interaction Facility (RSIF) using several SF6 evasion experiments. During each experiment, a water tank below the rain simulator was supersaturated with SF6, a synthetic gas, and the gas transfer velocities were calculated from the measured decrease in SF6 concentration with time. The results from experiments with 18 different rain rates (7 to 110 mm h(-1)) and 1 of 2 dropsizes (2.8 or 4.2 mm diameter) confirm a significant and systematic enhancement of air-water gas exchange by rainfall. The gas transfer velocities derived from our experiment were related to the kinetic energy flux calculated from the rain rate and dropsize. The relationship obtained for mono-dropsize rain at the RSIF was extrapolated to natural rain using the kinetic energy flux of natural rain calculated from the Marshall-Palmer raindrop size distribution. Results of laboratory experiments at RSIF were compared to field observations made during a tropical rainstorm in Miami, Florida and show good agreement between laboratory and field data.
引用
收藏
页码:149 / 158
页数:10
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