GISP2 Ice Core GISP2 Air Mass Trajectories Kahl, J.D.W.; Martinez, D.A.; Kuhns, H.; Davidson, C.I.; Jaffrezo, J.-L.; Harris, J.M. Kahl, J.D.W. Martinez, D.A. Kuhns, H. Davidson, C.I. Jaffrezo, J.-L. Harris, J.M. earth science/paleoclimate/paleoclimatic modeling (age,null,null,hour of day,null,paleoclimatic modeling,null,null,N,500 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (age,null,null,day of month,null,paleoclimatic modeling,null,null,N,700 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,700 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (age,null,null,month of year,null,paleoclimatic modeling,null,null,N,500 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (age,null,null,day of month,null,paleoclimatic modeling,null,null,N,500 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,700 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,500 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,500 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (age,null,null,month of year,null,paleoclimatic modeling,null,null,N,700 mb trajectory) earth science/paleoclimate/paleoclimatic modeling (age,null,null,hour of day,null,paleoclimatic modeling,null,null,N,700 mb trajectory) earth science/paleoclimate/ice core (GISP2>LATITUDE 72.6>LONGITUDE -38.5) The seasonal variation in atmospheric transport patterns to Summit, Greenland, is examined using a 44-year record of daily, 10-day, isobaric back trajectories at the 500-hPa level. Over 24,000 modeled trajectories are aggregated into distinct patterns using cluster analysis. Ten-day trajectories reaching Summit are longest during winter, with 67% extending upwind (westward) as far back as Asia or Europe. Trajectories are shortest during summer, with 46% having 10-day origins over North America. During all seasons a small percentage (3-7%) of trajectories originate in west Asia/Europe and follow a meridional path over the Arctic Ocean before approaching Summit from the northwest. Trajectories at the 700-hPa level tend to be shorter than at 500 hPa, with many of the 700-hPa trajectories from North America tracking over the North Atlantic and approaching Summit from the south. The long-range transport climatology for Summit is similar to a year-round climatology prepared for Dye 3, located 900 km to the south [Davidson et al., 1993b]. An analysis of several aerosol species measured at Summit during summer 1994 reveals examples of the usefulness and also the limitations of using long-range air trajectories to interpret chemical data. STUDY NOTES: The included data sets are files for 500 mb and 700 mb atmospheric trajectories for the Greenland Summit. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kahl, J.D.W. Investigator : Martinez, D.A. Investigator : Kuhns, H. Investigator : Davidson, C.I. Investigator : Jaffrezo, J.-L. Investigator : Harris, J.M. 1997-11-30 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17837 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/traject.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/700traj/ https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/500traj/ https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/traject.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/700traj/ https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/500traj/ English https://www.ncdc.noaa.gov/paleo/study/17837 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/traject.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/700traj/ https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/gisp2/traject/500traj/ Jonathan D. W. Kahl, Dewayne A. Martinez, Hampden Kuhns, Clifford I. Davidson, Jean‐Luc Jaffrezo, Joyce M. Harris1997Air mass trajectories to Summit, Greenland: A 44-year climatology and some episodic eventsJournal of Geophysical Research: Oceans102C1226861-2687510.1029/97JC00296http://onlinelibrary.wiley.com/enhanced/doi/10.1029/97JC00296 START YEAR: 1946 AD * END YEAR: 1989 AD -38.5 72.6 -38.5 72.6