scholarly journals An Overview of Atmospheric Features Over the Western North Atlantic Ocean and North American East Coast – Part 1: Analysis of Aerosols, Gases, and Wet Deposition Chemistry

2021 ◽  
Vol 126 (4) ◽  
Author(s):  
Andrea F. Corral ◽  
Rachel A. Braun ◽  
Brian Cairns ◽  
Vesta Afzali Gorooh ◽  
Hongyu Liu ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North American ◽  
Wet Deposition ◽  
East Coast ◽  
North Atlantic Ocean ◽  
American East Coast

scholarly journals Synoptic influences on springtime tropospheric O<sub>3</sub> and CO over the North American export region observed by TES

2009 ◽  
Vol 9 (11) ◽  
pp. 3755-3776 ◽  
Author(s):  
J. Hegarty ◽  
H. Mao ◽  
R. Talbot
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North American ◽  
East Coast ◽  
North Atlantic Ocean ◽  
Free Troposphere ◽  
The North ◽  
Circulation Patterns ◽  
The Us ◽  
Us East Coast

Abstract. The relationship between synoptic circulation patterns over the western North Atlantic Ocean in spring (March, April, and May) and tropospheric O3 and CO was investigated using retrievals from the Tropospheric Emission Spectrometer (TES) for 2005 and 2006. Seasonal composites of TES retrievals reprocessed to remove the artificial geographic structure added from the a priori revealed a channel of slightly elevated O3 (>55 ppbv) and CO (>115 ppbv) at the 681 hPa retrieval level between 30° N and 45° N extending from North America out over the Atlantic Ocean. Ozone and CO in this region were correlated at r=0.22 with a slope value of 0.13 mol mol−1 indicative of the overall impact of photochemical chemical processes in North American continental export. Composites of TES retrievals for the six predominant circulation patterns identified as map types from sea level pressure fields of the NCEP FNL analyses showed large variability in the distribution of tropospheric O3. Map types MAM2 and MAM3 featuring cyclones near the US east coast produced the greatest export to the lower free troposphere with O3>65 ppbv and a relatively well-defined O3-CO correlation (slope values near 0.20 mol mol−1). The ensembles of HYSPLIT backward trajectories indicated that the high O3 levels were possibly a result of pollutants lofted to the free troposphere by the warm conveyor belt (WCB) of a cyclone. An important finding was that pollutant export occurred in the main WCB branch to the east of the cyclone and in a secondary branch circling to the back of the cyclone center. Conversely, a map type featuring a large anticyclone dominating the flow over the US east coast (MAM6) restricted export with O3 levels generally <55 ppbv and CO levels generally <110 ppbv. There was also evidence of stratospheric intrusions particularly to the north of 45° N in the 316 hPa composites predominately for MAM1 which featured a large cyclone near Newfoundland. However, the concurrence of these intrusions with pollutant export, specifically in the southwestern North Atlantic Ocean, made it difficult to delineate their respective contributions to the 681 hPa O3 composites.

scholarly journals Synoptic influences on springtime tropospheric O<sub>3</sub> and CO over the North American export region observed by TES

2008 ◽  
Vol 8 (6) ◽  
pp. 19743-19789
Author(s):  
J. Hegarty ◽  
H. Mao ◽  
R. Talbot
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North American ◽  
East Coast ◽  
North Atlantic Ocean ◽  
Free Troposphere ◽  
The North ◽  
Circulation Patterns ◽  
The Us ◽  
Us East Coast

Abstract. The relationship between synoptic circulation patterns over the western North Atlantic Ocean in spring (March, April, and May) and tropospheric O3 and CO was investigated using retrievals from the Tropospheric Emission Spectrometer (TES) for 2005 and 2006. Seasonal composites of TES retrievals reprocessed to remove the artificial geographic structure added from the a priori revealed a channel of slightly elevated O3 (>55 ppbv) and CO (>115 ppbv) at the 681 hPa retrieval level between 30° N and 45° N extending from North America out over the Atlantic Ocean. Ozone and CO in this region were correlated at r=0.32 with a slope value of 0.16 indicative of the overall impact of photochemical chemical processes in North American continental export. Composites of TES retrievals for the six predominant circulation patterns identified as map types from sea level pressure fields of the NCEP FNL analyses showed large variability in the distribution of tropospheric O3. Map types featuring cyclones near the US east coast (MAM2–MAM5) produced the greatest export to the lower free troposphere with O3>65 ppbv and O3-CO slopes ranging 0.25–0.36. HYSPLIT backward trajectories indicated that the high O3 levels were possibly a result of pollutants lofted to the free troposphere by the warm conveyor belt (WCB) of a cyclone. An important finding was that pollutant export occurred in the main WCB branch to the east of the cyclone and in a secondary branch circling to the back of the cyclone center. Conversely, a map type featuring a large anticyclone dominating the flow over the US east coast (MAM6) restricted export with O3 levels generally <45 ppbv and an O3-CO slope near zero. There was also evidence of stratospheric intrusions particularly to the north of 45° N in the 316 hPa composites predominately for MAM1 which featured a large cyclone near Newfoundland. However, it was not clear from the available data that these intrusions had a strong impact on the 681 hPa O3 composites in the western North Atlantic Ocean further south where the data showed clear evidence of the influence of pollutant export.

Influence of North American land processes on North Atlantic Ocean variability

2003 ◽  
Vol 37 (1-2) ◽  
pp. 33-56 ◽  
Author(s):  
Uma S Bhatt ◽  
Edwin K Schneider ◽  
David G Dewitt
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North American ◽  
North Atlantic Ocean ◽  
Ocean Variability

Export of North American Ozone Pollution to the North Atlantic Ocean

Science ◽  
1993 ◽  
Vol 259 (5100) ◽  
pp. 1436-1439 ◽  
Author(s):  
D. D. Parrish ◽  
J. S. Holloway ◽  
M. Trainer ◽  
P. C. Murphy ◽  
F. C. Fehsenfeld ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North American ◽  
North Atlantic Ocean ◽  
Ozone Pollution ◽  
The North ◽  
The North Atlantic
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