TY - JOUR
T1 - Advected airmass reservoirs in the downwind of mountains and their roles in overrunning boundary layer depths over the plains
AU - Pal, Sandip
PY - 2019/8/15
Y1 - 2019/8/15
N2 - Atmospheric boundary layer depths (BLDs) over continental sites have long been meticulouslycharacterized. However, a downwind‐footprint concept for BLDs over plains under the impact of seasonallyand spatially changing horizontal advection of BLDs off elevated terrains has remained unexplored. For thefirst time, we provide observational evidence of the impact of mountains on regional BLDs using 25‐years(1991–2015) of rawinsonde‐retrieved afternoon BLDs over 22 sites located in the mountains' (Rockies andAppalachians) downstream. Results suggest that mountain‐advected air mass, elevated terrains, and windplay a significant role in modulating BLD variability “miles away” from terrains. We found significant BLDcontrasts over the plains (400–1,500 m) under mountain‐advected versus flatland‐advected flows pertainingto elevated mixed layers off the mountain ranges. The BLD contrasts were higher in the downwind ofRockies than the Appalachians, and higher BL
AB - Atmospheric boundary layer depths (BLDs) over continental sites have long been meticulouslycharacterized. However, a downwind‐footprint concept for BLDs over plains under the impact of seasonallyand spatially changing horizontal advection of BLDs off elevated terrains has remained unexplored. For thefirst time, we provide observational evidence of the impact of mountains on regional BLDs using 25‐years(1991–2015) of rawinsonde‐retrieved afternoon BLDs over 22 sites located in the mountains' (Rockies andAppalachians) downstream. Results suggest that mountain‐advected air mass, elevated terrains, and windplay a significant role in modulating BLD variability “miles away” from terrains. We found significant BLDcontrasts over the plains (400–1,500 m) under mountain‐advected versus flatland‐advected flows pertainingto elevated mixed layers off the mountain ranges. The BLD contrasts were higher in the downwind ofRockies than the Appalachians, and higher BL
U2 - 10.1029/2019GL083988
DO - 10.1029/2019GL083988
M3 - Article
JO - Geophysical Research Letters
JF - Geophysical Research Letters
ER -