Validating clear air absorption models using ground-based microwave radiometers and vice-versa

被引:42
作者
Hewison, TJ
Cimini, D
Martin, L
Gaffard, C
Nash, J
机构
[1] Univ Reading, Met Off, Earley Gate RG6 6BB, England
[2] Univ Colorado, CIRES, Boulder, CO 80309 USA
[3] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland
关键词
D O I
10.1127/0941-2948/2006/0097
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Microwave radiometer observations are compared with various radiative transfer model calculations based on simultaneous radiosondes. This analysis uses observations from Payerne, Switzerland, in cloud free conditions during the Temperature Humidity and Cloud (TUC) experiment in winter 2003/04. The results show a systematic bias in the brightness temperatures measured by the Radiometrics profiler at 55-59 GHz, which has since been corrected in the control software. Observations at lower frequencies (22-30 GHz) in these cold conditions do not support recent proposed changes to the width of the 22.235 GHz water vapour line, although this is subject to the assumption of no residual bias in the radiosonde humidity. At intermediate frequencies (51-54 GHz), the absorption models produce large differences, which may be due to differences in oxygen line coupling and highlight the need for further laboratory measurements at low temperatures.
引用
收藏
页码:27 / 36
页数:10
相关论文
共 22 条
[1]  
[Anonymous], 87224 NTIA
[2]   Uncertainties in the temperature dependence of the line-coupling parameters of the microwave oxygen band: Impact study [J].
Boukabara, SA ;
Clough, SA ;
Moncet, JL ;
Krupnov, AF ;
Tretyakov, MY ;
Parshin, VV .
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2005, 43 (05) :1109-1114
[3]  
CIMINI C, 2004, 14 ARM SCI TEAM M P, P22
[4]   Temperature and humidity profile retrievals from ground-based microwave radiometers during TUC [J].
Cimini, D ;
Hewison, TJ ;
Martin, L ;
Güldner, J ;
Gaffard, C ;
Marzano, FS .
METEOROLOGISCHE ZEITSCHRIFT, 2006, 15 (01) :45-56
[5]   Comparison of brightness temperatures observed from ground-based microwave radiometers during TUC [J].
Cimini, D ;
Hewison, TJ ;
Martin, L .
METEOROLOGISCHE ZEITSCHRIFT, 2006, 15 (01) :19-25
[6]   Analysis and improvement of tipping calibration for ground-based microwave radiometers [J].
Han, Y ;
Westwater, ER .
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2000, 38 (03) :1260-1276
[7]  
HEWISON TJ, 2005, UNPUB J GEOPHYS RES
[8]  
HEWISON TJ, 2003, ISTP C 14 20 SEPT LE, P136
[9]  
HEWISON TJ, 2003, 26 OD MET OFF
[10]  
JANSSEN M, 1993, WILEY SERIES REMOTE, V318