Downscaling near-surface wind over complex terrain using a physically-based statistical modeling approach

Verfasser / Beitragende:
[Hsin-Yuan Huang, Scott Capps, Shao-Ching Huang, Alex Hall]
Ort, Verlag, Jahr:
2015
Enthalten in:
Climate Dynamics, 44/1-2(2015-01-01), 529-542
Format:
Artikel (online)
ID: 605474125
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024 7 0 |a 10.1007/s00382-014-2137-1  |2 doi 
035 |a (NATIONALLICENCE)springer-10.1007/s00382-014-2137-1 
245 0 0 |a Downscaling near-surface wind over complex terrain using a physically-based statistical modeling approach  |h [Elektronische Daten]  |c [Hsin-Yuan Huang, Scott Capps, Shao-Ching Huang, Alex Hall] 
520 3 |a A physically-based statistical modeling approach to downscale coarse resolution reanalysis near-surface winds over a region of complex terrain is developed and tested in this study. Our approach is guided by physical variables and meteorological relationships that are important for determining near-surface wind flow. Preliminary fine scale winds are estimated by correcting the course-to-fine grid resolution mismatch in roughness length. Guided by the physics shaping near-surface winds, we then formulate a multivariable linear regression model which uses near-surface micrometeorological variables and the preliminary estimates as predictors to calculate the final wind products. The coarse-to-fine grid resolution ratio is approximately 10-1 for our study region of southern California. A validated 3-km resolution dynamically-downscaled wind dataset is used to train and validate our method. Winds from our statistical modeling approach accurately reproduce the dynamically-downscaled near-surface wind field with wind speed magnitude and wind direction errors of <1.5ms−1 and 30°, respectively. This approach can greatly accelerate the production of near-surface wind fields that are much more accurate than reanalysis data, while limiting the amount of computational and time intensive dynamical downscaling. Future studies will evaluate the ability of this approach to downscale other reanalysis data and climate model outputs with varying coarse-to-fine grid resolutions and domains of interest. 
540 |a Springer-Verlag Berlin Heidelberg, 2014 
690 7 |a Near-surface wind  |2 nationallicence 
690 7 |a Dynamical downscaling  |2 nationallicence 
690 7 |a Statistical downscaling  |2 nationallicence 
690 7 |a Complex terrain  |2 nationallicence 
700 1 |a Huang  |D Hsin-Yuan  |u Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, 7343 Math Science Building, Los Angeles, CA, USA  |4 aut 
700 1 |a Capps  |D Scott  |u Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
700 1 |a Huang  |D Shao-Ching  |u Institute for Digital Research and Education, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
700 1 |a Hall  |D Alex  |u Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
773 0 |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/1-2(2015-01-01), 529-542  |x 0930-7575  |q 44:1-2<529  |1 2015  |2 44  |o 382 
856 4 0 |u https://doi.org/10.1007/s00382-014-2137-1  |q text/html  |z Onlinezugriff via DOI 
898 |a BK010053  |b XK010053  |c XK010000 
900 7 |a Metadata rights reserved  |b Springer special CC-BY-NC licence  |2 nationallicence 
908 |D 1  |a research-article  |2 jats 
949 |B NATIONALLICENCE  |F NATIONALLICENCE  |b NL-springer 
950 |B NATIONALLICENCE  |P 856  |E 40  |u https://doi.org/10.1007/s00382-014-2137-1  |q text/html  |z Onlinezugriff via DOI 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Huang  |D Hsin-Yuan  |u Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, 7343 Math Science Building, Los Angeles, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Capps  |D Scott  |u Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Huang  |D Shao-Ching  |u Institute for Digital Research and Education, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 700  |E 1-  |a Hall  |D Alex  |u Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, USA  |4 aut 
950 |B NATIONALLICENCE  |P 773  |E 0-  |t Climate Dynamics  |d Springer Berlin Heidelberg  |g 44/1-2(2015-01-01), 529-542  |x 0930-7575  |q 44:1-2<529  |1 2015  |2 44  |o 382