Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD028380 |
Forest Disturbance Feedbacks From Bedrock to Atmosphere Using Coupled Hydrometeorological Simulations Over the Rocky Mountain Headwaters | |
Forrester, Mary M.1; Maxwell, Reed M.1; Bearup, Lindsay A.2; Gochis, David J.3 | |
2018-09-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:17页码:9026-9046 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The mountain pine beetle (MPB) has dramatically influenced high-elevation pine forests of western North America, with recent infestations causing millions of acres of forest mortality and basal area loss. While ecohydrologic implications of infestation have been studied extensively in recent years, few have explored atmospheric feedbacks of widespread canopy transpiration loss or the potential role of groundwater to amplify or mitigate changes to land energy. This work presents bedrock-to-atmosphere simulations of coupled meteorological and hydrologic states over the Colorado headwaters. Analyses compare configurations with (1) default land surface parameters and (2) disturbance simulations with adjusted transpiration parameters in infested cells. An analysis of variance was conducted to identify regions of significant response to mountain pine beetle. Changes to increased soil moisture and Bowen ratios were found to be statistically significant in MPB-infested areas and in nonlocal valleys, while planetary boundary layer (PBL) response was significant only in high elevations of the headwaters watershed. Temperature-humidity covariance was evaluated using mixing diagrams; the results suggest that increased surface Bowen ratios from MPB could affect entrainment of dry air from the troposphere. The PBL is hotter, drier, and higher under infested forest conditions, which could have implications to atmosphere-vegetation feedbacks and forest drought stress. Finally, land-atmosphere coupling was sensitive to antecedent subsurface moisture. Regions with shallow water tables exhibit greater magnitude response to MPB at the surface and in the PBL, a finding that has repercussions for ecosystem resilience and hydrologic representation in meteorological modeling. Plain Language Summary The mountain pine beetle (MPB), a species of bark beetle native to North America, has infested pine forests in the Rocky Mountains for the past two decades in an unprecedented epidemic. Millions of acres of high-elevation lodgepole and ponderosa have died, and scientists are understandably interested in ecohydrologic implications. With canopy death comes increased soil moisture, surface temperature, and decreased transpiration, but few have investigated the possible atmospheric feedbacks from this forest disturbance. In this study, we use a hydrometeorological model to simulate the impact of MPB from the subsurface to the atmosphere. Model results show that infested regions experience decreased evaporative energy and higher surface temperatures, which affects the development of the planetary boundary layer (PBL), the highest point of the atmosphere still influenced by surface roughness. The diurnal evolution of the PBL is sensitive to moisture in the subsurface and surface vegetation. Our results show that regions with shallower water tables responded to simulated forest mortality with greater intensity. This means that ecohydrologic sensitivity to disturbance depends heavily on antecedent available moisture, a finding that can have implications to ecosystem health, resilience, and susceptibility to future land disturbance events. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445617500008 |
WOS关键词 | LAND-COVER CHANGE ; PINE-BEETLE ; SOIL-MOISTURE ; SNOW ACCUMULATION ; GROUNDWATER-FLOW ; TREE MORTALITY ; CLIMATE-CHANGE ; UNITED-STATES ; SURFACE-WATER ; LARGE-SCALE |
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/33374 |
专题 | 气候变化 |
作者单位 | 1.Colorado Sch Mines, Hydrol Sci & Engn Program, Golden, CO 80401 USA; 2.Bur Reclamat, Tech Serv Ctr, Water Resources Engn & Management, Denver, CO USA; 3.Natl Ctr Atmospher Res, Res Applicat Lab, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Forrester, Mary M.,Maxwell, Reed M.,Bearup, Lindsay A.,et al. Forest Disturbance Feedbacks From Bedrock to Atmosphere Using Coupled Hydrometeorological Simulations Over the Rocky Mountain Headwaters[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(17):9026-9046. |
APA | Forrester, Mary M.,Maxwell, Reed M.,Bearup, Lindsay A.,&Gochis, David J..(2018).Forest Disturbance Feedbacks From Bedrock to Atmosphere Using Coupled Hydrometeorological Simulations Over the Rocky Mountain Headwaters.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(17),9026-9046. |
MLA | Forrester, Mary M.,et al."Forest Disturbance Feedbacks From Bedrock to Atmosphere Using Coupled Hydrometeorological Simulations Over the Rocky Mountain Headwaters".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.17(2018):9026-9046. |
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