The direct assimilation of principal components of IASI spectra in the ECMWF 4D-Var

被引：26

作者：

Matricardi, M. ^{[1
]}

McNally, A. P. ^{[1
]}

机构：

[1] European Ctr Medium Range Weather Forecasts, Reading RG2 9AX, Berks, England

来源：

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY | 2014年 / 140卷 / 679期

关键词：

IASI; data assimilation; satellite data; principal component analysis; RADIATIVE-TRANSFER MODEL; RESOLUTION; RADIANCES; SPACE;

D O I：

10.1002/qj.2156

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

The European Centre for Medium-range Weather Forecasts (ECMWF) 4D-Var data assimilation system has been modified to allow the direct assimilation of Principal Component (PC) scores derived from spectra measured by the Infrared Atmospheric Sounding Interferometer (IASI). Testing of a prototype system where 165 IASI radiances are replaced by just 20 PC scores shows significant computational savings with no detectable loss of skill in the resulting analyses or forecasts. Indeed in some respects the assimilation of PC scores leads to marginal improvements over the traditional radiance-based assimilation.

引用

页码：573 / 582

页数：10

共 19 条

[1]

[Anonymous], 2002, Principal components analysis

[2] A principal component noise filter for high spectral resolution infrared measurements [J].

Antonelli, P ;

Revercomb, HE ;

Sromovsky, LA ;

Smith, WL ;

Knuteson, RO ;

Tobin, DC ;

Garcia, RK ;

Howell, HB ;

Huang, HL ;

Best, FA .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2004, 109 (D23) :1-22

[3] Estimates of spatial and interchannel observation-error characteristics for current sounder radiances for numerical weather prediction. I: Methods and application to ATOVS data [J].

Bormann, Niels ;

Bauer, Peter .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2010, 136 (649) :1036-1050

[4]

Chalon G., 2001, P 52 C IAF

[5] The use of principal component analysis for the assimilation of high-resolution infrared sounder observations for numerical weather prediction [J].

Collard, A. D. ;

McNally, A. P. ;

Hilton, F. I. ;

Healy, S. B. ;

Atkinson, N. C. .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2010, 136 (653) :2038-2050

[6] The assimilation of Infrared Atmospheric Sounding Interferometer radiances at ECMWF [J].

Collard, A. D. ;

McNally, A. P. .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2009, 135 (641) :1044-1058

[7]

Dee D, 2004, P ECMWF WORKSH ASS H

[8] Diagnosis of observation, background and analysis-error statistics in observation space [J].

Desroziers, G. ;

Berre, L. ;

Chapnik, B. ;

Poli, P. .

QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2005, 131 (613) :3385-3396

[9]

HOLLINGSWORTH A, 1986, TELLUS A, V38, P111, DOI 10.1111/j.1600-0870.1986.tb00460.x

[10]

HUANG HL, 1992, J APPL METEOROL, V31, P265, DOI 10.1175/1520-0450(1992)031<0265:VRAAOA>2.0.CO

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