ASIAN MONSOON ANTICYCLONE;
BLACK CARBON;
CLIMATE SIMULATIONS;
SOURCE ATTRIBUTION;
TRANSIT-TIME;
POLLUTION;
MODEL;
AIR;
DISTRIBUTIONS;
STRATOSPHERE;
D O I:
10.1029/2020JD033811
中图分类号:
P4 [大气科学(气象学)];
学科分类号:
0706 ;
070601 ;
摘要:
Trace gases and aerosols play an important role in Arctic chemistry and climate. As most Arctic tracers and aerosols are transported from midlatitude source regions, long-range transport into the Arctic is one of the key factors to understand the current and future states of Arctic climate. While previous studies have investigated the airmass fraction and transit time distribution in the Arctic, the actual transport pathways and their underlying dynamics and efficiencies are yet to be understood. In this study, we implement a large ensemble of idealized tagged pulse passive tracers in the Whole Atmosphere Community Climate Model version 5 to identify and analyze summertime transport pathways from different Northern Hemisphere surface regions into the Arctic. Three different transport pathways are identified as those associated with fast, intermediate and slow time scales. Midlatitude tracers can be transported into the Arctic in the troposphere via the fast transport pathway (similar to 8 days), which moves tracers northward from the source region mainly through transient eddies. For the intermediate transport pathway, which happens on 1-3 weeks' time scales, midlatitude tracers are first zonally transported by the jet stream, and then advected northward into the Arctic over Alaska and northern North Atlantic. Tropical and subtropical tracers are transported into the Arctic lower stratosphere via the slow transport pathway (1-3 months), as the tracers are lifted upward into the tropical and subtropical lower stratosphere, and then transported into the Arctic following the isentropic surfaces.
机构:
British Antarctic Survey, Cambridge, England
Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge, EnglandBritish Antarctic Survey, Cambridge, England
McKenna, Christine M.
Bracegirdle, Thomas J.
论文数: 0引用数: 0
h-index: 0
机构:
British Antarctic Survey, Cambridge, EnglandBritish Antarctic Survey, Cambridge, England
Bracegirdle, Thomas J.
Shuckburgh, Emily F.
论文数: 0引用数: 0
h-index: 0
机构:
British Antarctic Survey, Cambridge, EnglandBritish Antarctic Survey, Cambridge, England
Shuckburgh, Emily F.
Haynes, Peter H.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge, EnglandBritish Antarctic Survey, Cambridge, England
Haynes, Peter H.
Joshi, Manoj M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ East Anglia, Ctr Ocean & Atmospher Sci, Norwich, Norfolk, England
Univ East Anglia, Climat Res Unit, Norwich, Norfolk, EnglandBritish Antarctic Survey, Cambridge, England
机构:
CALTECH, Pasadena, CA 91125 USACALTECH, Pasadena, CA 91125 USA
Wunch, D.
Wennberg, P. O.
论文数: 0引用数: 0
h-index: 0
机构:
CALTECH, Pasadena, CA 91125 USACALTECH, Pasadena, CA 91125 USA
Wennberg, P. O.
Messerschmidt, J.
论文数: 0引用数: 0
h-index: 0
机构:
CALTECH, Pasadena, CA 91125 USACALTECH, Pasadena, CA 91125 USA
Messerschmidt, J.
Parazoo, N. C.
论文数: 0引用数: 0
h-index: 0
机构:
CALTECH, Jet Prop Lab, Pasadena, CA USA
Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA USACALTECH, Pasadena, CA 91125 USA
Parazoo, N. C.
Toon, G. C.
论文数: 0引用数: 0
h-index: 0
机构:
CALTECH, Pasadena, CA 91125 USA
CALTECH, Jet Prop Lab, Pasadena, CA USACALTECH, Pasadena, CA 91125 USA
Toon, G. C.
Deutscher, N. M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Bremen, D-28359 Bremen, GermanyCALTECH, Pasadena, CA 91125 USA
Deutscher, N. M.
Keppel-Aleks, G.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USACALTECH, Pasadena, CA 91125 USA
Keppel-Aleks, G.
Roehl, C. M.
论文数: 0引用数: 0
h-index: 0
机构:
CALTECH, Pasadena, CA 91125 USACALTECH, Pasadena, CA 91125 USA
Roehl, C. M.
Randerson, J. T.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USACALTECH, Pasadena, CA 91125 USA
Randerson, J. T.
论文数: 引用数:
h-index:
机构:
Warneke, T.
Notholt, J.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Bremen, D-28359 Bremen, GermanyCALTECH, Pasadena, CA 91125 USA
机构:
Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo 1130033, JapanUniv Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo 1130033, Japan