Dynamical Downscaling of ERA-Interim Temperature and Precipitation for Alaska

被引:63
作者
Bieniek, Peter A. [1 ]
Bhatt, Uma S. [2 ,3 ]
Walsh, John E. [1 ]
Rupp, T. Scott [4 ]
Zhang, Jing [5 ,6 ]
Krieger, Jeremy R. [7 ]
Lader, Rick [1 ]
机构
[1] Univ Alaska Fairbanks, Int Arctic Res Ctr, Fairbanks, AK USA
[2] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
[3] Univ Alaska Fairbanks, Dept Atmospher Sci, Fairbanks, AK USA
[4] Univ Alaska Fairbanks, Scenarios Network Alaska & Arctic Planning, Fairbanks, AK USA
[5] North Carolina A&T State Univ, Dept Phys, Greensboro, NC USA
[6] North Carolina A&T State Univ, Dept Energy & Environm Syst, Greensboro, NC USA
[7] Univ Alaska Fairbanks, Arctic Reg Supercomp Ctr, Fairbanks, AK USA
基金
美国国家科学基金会;
关键词
CLIMATE DIVISIONS; WEATHER RESEARCH; INVERSIONS; TRENDS;
D O I
10.1175/JAMC-D-15-0153.1
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 interim reanalysis (ERA-Interim) has been downscaled using a regional model covering Alaska at 20-km spatial and hourly temporal resolution for 1979-2013. Stakeholders can utilize these enhanced-resolution data to investigate climate- and weather-related phenomena in Alaska. Temperature and precipitation are analyzed and compared among ERA-Interim, WRF Model downscaling, and in situ observations. Relative to ERA-Interim, the downscaling is shown to improve the spatial representation of temperature and precipitation around Alaska's complex terrain. Improvements include increased winter and decreased summer higher-elevation downscaled seasonal average temperatures. Precipitation is also enhanced over higher elevations in all seasons relative to the reanalysis. These spatial distributions of temperature and precipitation are consistent with the few available gridded observational datasets that account for topography. The downscaled precipitation generally exceeds observationally derived estimates in all seasons over mainland Alaska, and it is less than observations in the southeast. Temperature biases tended to be more mixed, and the downscaling reduces absolute bias at higher elevations, especially in winter. Careful selection of data for local site analysis from the downscaling can help to reduce these biases, especially those due to inconsistencies in elevation. Improved meteorological station coverage at higher elevations will be necessary to better evaluate gridded downscaled products in Alaska because biases vary and may even change sign with elevation.
引用
收藏
页码:635 / 654
页数:20
相关论文
共 46 条
[1]  
[Anonymous], 2012, 1379 US GEOL SURV
[2]   THE WEATHER RESEARCH AND FORECASTING MODEL'S COMMUNITY VARIATIONAL/ENSEMBLE DATA ASSIMILATION SYSTEM WRFDA [J].
Barker, Dale ;
Huang, Xiang-Yu ;
Liu, Zhiquan ;
Auligne, Tom ;
Zhang, Xin ;
Rugg, Steven ;
Ajjaji, Raji ;
Bourgeois, Al ;
Bray, John ;
Chen, Yongsheng ;
Demirtas, Meral ;
Guo, Yong-Run ;
Henderson, Tom ;
Huang, Wei ;
Lin, Hui-Chuan ;
Michalakes, John ;
Rizvi, Syed ;
Zhang, Xiaoyan .
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY, 2012, 93 (06) :831-843
[3]   Examining glacier mass balances with a hierarchical modeling approach [J].
Bhatt, Uma S. ;
Zhang, Jing ;
Lingle, Craig S. ;
Phillips, Lisa M. ;
Tangborn, Wendell V. .
COMPUTING IN SCIENCE & ENGINEERING, 2007, 9 (02) :60-67
[4]   Recent Declines in Warming and Vegetation Greening Trends over Pan-Arctic Tundra [J].
Bhatt, Uma S. ;
Walker, Donald A. ;
Raynolds, Martha K. ;
Bieniek, Peter A. ;
Epstein, Howard E. ;
Comiso, Josefino C. ;
Pinzon, Jorge E. ;
Tucker, Compton J. ;
Polyakov, Igor V. .
REMOTE SENSING, 2013, 5 (09) :4229-4254
[5]   Using Climate Divisions to Analyze Variations and Trends in Alaska Temperature and Precipitation [J].
Bieniek, Peter A. ;
Walsh, John E. ;
Thoman, Richard L. ;
Bhatt, Uma S. .
JOURNAL OF CLIMATE, 2014, 27 (08) :2800-2818
[6]   Climate Divisions for Alaska Based on Objective Methods [J].
Bieniek, Peter A. ;
Bhatt, Uma S. ;
Thoman, Richard L. ;
Angeloff, Heather ;
Partain, James ;
Papineau, John ;
Fritsch, Frederick ;
Holloway, Eric ;
Walsh, John E. ;
Daly, Christopher ;
Shulski, Martha ;
Hufford, Gary ;
Hill, David F. ;
Calos, Stavros ;
Gens, Rudiger .
JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY, 2012, 51 (07) :1276-1289
[7]   Surface-based temperature inversions in Alaska from a climate perspective [J].
Bourne, S. M. ;
Bhatt, U. S. ;
Zhang, J. ;
Thoman, R. .
ATMOSPHERIC RESEARCH, 2010, 95 (2-3) :353-366
[8]   A comparison of the regional Arctic System Reanalysis and the global ERA-Interim Reanalysis for the Arctic [J].
Bromwich, David H. ;
Wilson, Aaron B. ;
Bai, Le-Sheng ;
Moore, George W. K. ;
Bauer, Peter .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2016, 142 (695) :644-658
[9]   The ERA-Interim reanalysis: configuration and performance of the data assimilation system [J].
Dee, D. P. ;
Uppala, S. M. ;
Simmons, A. J. ;
Berrisford, P. ;
Poli, P. ;
Kobayashi, S. ;
Andrae, U. ;
Balmaseda, M. A. ;
Balsamo, G. ;
Bauer, P. ;
Bechtold, P. ;
Beljaars, A. C. M. ;
van de Berg, L. ;
Bidlot, J. ;
Bormann, N. ;
Delsol, C. ;
Dragani, R. ;
Fuentes, M. ;
Geer, A. J. ;
Haimberger, L. ;
Healy, S. B. ;
Hersbach, H. ;
Holm, E. V. ;
Isaksen, L. ;
Kallberg, P. ;
Koehler, M. ;
Matricardi, M. ;
McNally, A. P. ;
Monge-Sanz, B. M. ;
Morcrette, J. -J. ;
Park, B. -K. ;
Peubey, C. ;
de Rosnay, P. ;
Tavolato, C. ;
Thepaut, J. -N. ;
Vitart, F. .
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2011, 137 (656) :553-597
[10]  
Drusch M, 2004, J APPL METEOROL, V43, P1282, DOI 10.1175/1520-0450(2004)043<1282:EGSAAA>2.0.CO