GRIP, North GRIP - Nitrous Oxide and Methane Data Flückiger, J.; Blunier, T.; Stauffer, B.; Chappellaz, J.A.; Spahni, R.; Kawamura, K.; Schwander, J.; Stocker, T.F.; Dahl-Jensen, D. Flückiger, J. Blunier, T. Stauffer, B. Chappellaz, J.A. Spahni, R. Kawamura, K. Schwander, J. Stocker, T.F. Dahl-Jensen, D. earth science/paleoclimate/climate forcing|ice cores (nitrous oxide,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (methane,bulk atmosphere,one standard deviation,parts per billion,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (nitrous oxide,bulk atmosphere,one standard deviation,parts per billion,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (gas age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/climate forcing|ice cores (methane,bulk atmosphere,null,parts per billion,null,climate forcing|ice cores,null,null,N,null) earth science/paleoclimate/ice core (GRIP>LATITUDE 72.58>LONGITUDE -37.63) (North GRIP>LATITUDE 75.1>LONGITUDE -42.33) Greenhouse gas measurements along polar ice cores provide important insight into the former composition of the atmosphere, its natural variations, and the responses to fast climatic changes in the past. We present high-resolution nitrous oxide (N2O) and methane (CH4) records measured along two ice cores from central Greenland covering part of Marine Isotope Stages 3 and 4 in the last glacial epoch. The N2O data confirm the hypothesis that N2O shows variations in phase to fast climatic changes observed in the Northern Hemisphere, the so-called Dansgaard-Oeschger (D-O) events. Variations exist not only for events with a long duration (1500 years and more) but also for the shorter ones. The comparison with CH4 unveils interesting differences between the response of CH4 and N2O to D-O events. While the average amplitudes of CH4 oscillations associated with D-O events are similar to those of the Northern Hemisphere summer insolation, the magnitude of the N2O concentration change instead correlates with the duration of the D-O events. The records give further insight into the timing of concentration changes at the beginning of D-O events. They show that for long-lasting events the N2O concentration starts to increase before both the sharp increase in the CH4 concentration and the temperature reconstructed for Greenland NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Flückiger, J. Investigator : Blunier, T. Investigator : Stauffer, B. Investigator : Chappellaz, J.A. Investigator : Spahni, R. Investigator : Kawamura, K. Investigator : Schwander, J. Investigator : Stocker, T.F. Investigator : Dahl-Jensen, D. 2004-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2473 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/gases/ngrip_n2o-ch4_2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip_n2o-ch4_2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/gases/ngrip_n2o-ch4_2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip_n2o-ch4_2004.txt English https://www.ncdc.noaa.gov/paleo/study/2473 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/ngrip/gases/ngrip_n2o-ch4_2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/gases/grip_n2o-ch4_2004.txt Flückiger, Jacqueline, Thomas Blunier, Bernhard Stauffer, Jérôme Chappellaz, Renato Spahni, Kenji Kawamura, Jakob Schwander, Thomas F. Stocker and Dorthe Dahl-Jensen. 2004. N2O and CH4 variations during the last glacial epoch: Insight into global processes. Global Biogeochemical Cycles, 18(1). DOI: 10.1029/2003GB002122 START YEAR: 76000 cal yr BP * END YEAR: 38100 cal yr BP -42.33 72.58 -37.63 75.1