Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.4986 |
High-resolution precipitation mapping in a mountainous watershed: ground truth for evaluating uncertainty in a national precipitation dataset | |
Daly, Christopher1; Slater, Melissa E.2; Roberti, Joshua A.2; Laseter, Stephanie H.3; Swift, Lloyd W., Jr.3 | |
2017-08-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
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ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2017 |
卷号 | 37 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A 69-station, densely spaced rain gauge network was maintained over the period 1951-1958 in the Coweeta Hydrologic Laboratory, located in the southern Appalachians in western North Carolina, USA. This unique dataset was used to develop the first digital seasonal and annual precipitation maps for the Coweeta basin, using elevation regression functions and residual interpolation. It was found that a 10-m elevation grid filtered to an approximately 7-km effective wavelength explained the most variance in precipitation (R-2 = 0.82-0.95). A 'dump zone' of locally high precipitation a short distance downwind from the mountain crest marking the southern border of the basin was the main feature that was not explained well by the precipitation-elevation relationship. These data and maps provided a rare 'ground-truth' for estimating uncertainty in the national-scale Parameter-elevation Relationships on Independent SlopesModel (PRISM) precipitation grids for this location and time period. Differences between PRISM and ground-truth were compared with uncertainty estimates produced by the PRISM model and cross-validation errors. Potential sources of uncertainty in the national PRISM grids were evaluated, including the effects of coarse grid resolution, limited station data, and imprecise station locations. The PRISM national grids matched closely (within 5%) with the Coweeta dataset. The PRISM regression prediction interval, which includes the influence of stations in an area of tens of kilometres around a given location, overestimated the local error at Coweeta (12-20%). Offsetting biases and generally low error rates made it difficult to isolate major sources of uncertainty in the PRISM grids, but station density and selection, and mislocation of stations were identified as likely sources of error. The methods used in this study can be repeated in other areas where high-density data exist to gain a more comprehensive picture of the uncertainties in national-level datasets, and can be used in network optimization exercises. |
英文关键词 | Coweeta precipitation mapping rain gauge precipitation measurement uncertainty PRISM orography interpolation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417298600009 |
WOS关键词 | CONTERMINOUS UNITED-STATES ; HYDROLOGICALLY BASED DATASET ; LAND-SURFACE FLUXES ; AIR-TEMPERATURE ; CLIMATE ; INTERPOLATION ; MODEL ; VALIDATION ; TERRAIN ; REGIONS |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/37020 |
专题 | 气候变化 |
作者单位 | 1.Oregon State Univ, Chem Biol & Environm Engn, Corvallis, OR 97331 USA; 2.NEON, Sci Unit, Boulder, CO 80301 USA; 3.US Forest Serv, Southern Res Stn, Coweeta Hydrol Lab, Otto, NC 28763 USA |
推荐引用方式 GB/T 7714 | Daly, Christopher,Slater, Melissa E.,Roberti, Joshua A.,et al. High-resolution precipitation mapping in a mountainous watershed: ground truth for evaluating uncertainty in a national precipitation dataset[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2017,37. |
APA | Daly, Christopher,Slater, Melissa E.,Roberti, Joshua A.,Laseter, Stephanie H.,&Swift, Lloyd W., Jr..(2017).High-resolution precipitation mapping in a mountainous watershed: ground truth for evaluating uncertainty in a national precipitation dataset.INTERNATIONAL JOURNAL OF CLIMATOLOGY,37. |
MLA | Daly, Christopher,et al."High-resolution precipitation mapping in a mountainous watershed: ground truth for evaluating uncertainty in a national precipitation dataset".INTERNATIONAL JOURNAL OF CLIMATOLOGY 37(2017). |
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