| Autor: |
Avendaño, Sofia T., Harp, Dylan R., Kurwadkar, Sudarshan, Ortiz, John P., Stauffer, Philip H. |
| Předmět: |
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| Zdroj: |
Geophysical Research Letters; 9/16/2021, Vol. 48 Issue 17, p1-10, 10p |
| Abstrakt: |
Barometric pumping is a gas transport mechanism that has important implications for many applications involving subsurface gas seepage processes. This study provides the first continental‐scale analysis of barometric‐pumping efficiency potential based on meteorology. We quantified the barometric‐pumping efficiency potential at 1,257 locations across the continental US and Canada. The results provide continental‐scale geographic dependencies of barometric‐pumping efficiency potential, indicating a significant correlation with latitude and a nonlinear dependence on longitude. The analysis also indicates that variability in barometric‐pumping efficiency potential decreases with distance from the coast and as elevation increases. Locations far from the coastline are more likely to have upper mid‐range potentials, while higher elevation locations are more likely to have low potentials. The highest barometric‐pumping efficiency potentials are mostly found around the Gulf of St. Lawrence around 50°N. Locations along the Atlantic coast exhibit large‐scale variations in potentials with a clear increasing trend with latitude. Plain Language Summary: We calculate the potential for variations in barometric pressure at different geographic locations to extract air and other gases from underground to the ground surface. This process is known as barometric pumping, an important process in various applications including underground gas leakage, radon gas entry into structures, and contaminated soil remediation. In this study, we evaluate the influence of latitude, longitude, elevation, and distance from the coast on the potential for barometric pumping based solely on atmospheric pressure records across North America (referred to as "potential" here for brevity). We find that latitude has the greatest effect on potential and that the highest potentials are found around the Gulf of St. Lawrence around 50°N. We also find that variability in potential decreases further from the coast and with high elevations. Generally, more eastern longitudes have higher potentials than central and western longitudes for the same latitudes. Key Points: North American barometric‐pumping efficiency potential increases with latitude until around 50°N and then decreasesFor similar latitudes, locations on the Pacific coast generally have lower potentials than on the Atlantic coast in North AmericaBarometric‐pumping efficiency potential becomes less variable further from the North American coastline [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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