Browsing by Author "Logan, Jennifer"

Now showing items 1-20 of 41

    • Asian chemical outflow to the Pacific in spring: Origins, pathways, and budgets 

      Bey, Isabelle; Jacob, Daniel James; Logan, Jennifer A.; Yantosca, Robert M. (Wiley-Blackwell, 2001)
      We analyze the Asian outflow of CO, ozone, and nitrogen oxides (NOx) to the Pacific in spring by using the GEOS-CHEM global three-dimensional model of tropospheric chemistry and simulating the Pacific Exploratory Mission-West ...

    • Atmospheric budget of acetone 

      Jacob, Daniel James; Field, Brendan; Jin, Emily; Bey, Isabelle; Li, Qinbin; Logan, Jennifer A.; Yantosca, Robert M.; Singh, Hanwant (Wiley-Blackwell, 2002)
      The atmospheric budget and distribution of acetone are investigated by using a priori estimates of sources and sinks to constrain a global three-dimensional atmospheric model simulation and then using atmospheric observations ...

    • Atmospheric chemistry in the Arctic and subarctic: Influence of natural fires, industrial emissions, and stratospheric inputs 

      Wofsy, Steven Charles; Sachse, G. W.; Gregory, G. L.; Blake, D. R.; Bradshaw, J. D.; Sandholm, S. T.; Singh, H. B.; Barrick, J. A.; Harriss, R. C.; Talbot, R. W.; Shipham, M. A.; Browell, E. V.; Jacob, Daniel James; Logan, Jennifer A. (Wiley-Blackwell, 1992)
      Haze layers with perturbed concentrations of trace gases, believed to originate from tundra and forest wild fires, were observed over extensive areas of Alaska and Canada in 1988. Enhancements of CH, CH, CH, CH, and CH ...

    • Climate forcings in Goddard Institute for Space Studies SI2000 simulations 

      Hansen, J.; Sato, M; Nazarenko, L; Ruedy, R; Lacis, A; Koch, D; Tegen, I; Hall, T; Shindell, D; Santer, B; Stone, P; Novakov, T; Thomason, L; Wang, R; Wang, Y; Jacob, Daniel James; Hollandsworth, S; Bishop, L; Logan, Jennifer A.; Thompson, A; Stolarski, R; Lean, J; Willson, R; Levitus, S; Antonov, J; Rayner, N; Parkerm, D; Christy, J (Wiley-Blackwell, 2002)
      We define the radiative forcings used in climate simulations with the SI2000 version of the Goddard Institute for Space Studies (GISS) global climate model. These include temporal variations of well-mixed greenhouse gases, ...

    • Comparative inverse analysis of satellite (MOPITT) and aircraft (TRACE-P) observations to estimate Asian sources of carbon monoxide 

      Heald, Colette L.; Jacob, Daniel James; Jones, Dylan B. A.; Palmer, Paul I.; Logan, Jennifer A.; Streets, D. G.; Sachse, Glen W.; Gille, John C.; Hoffman, Ross N.; Nehrkorn, Thomas (Wiley-Blackwell, 2004)
      We use an inverse model analysis to compare the top-down constraints on Asian sources of carbon monoxide (CO) in spring 2001 from (1) daily MOPITT satellite observations of CO columns over Asia and the neighboring oceans ...

    • Constraints on Asian and European sources of methane from CH 4 -C 2 H 6 -CO correlations in Asian outflow 

      Xiao, Yaping; Jacob, Daniel James; Wang, James; Logan, Jennifer A.; Palmer, Paul; Suntharalingam, Parvadha; Yantosca, Robert M.; Sachse, Glen; Blake, Donald; Streets, David (Wiley-Blackwell, 2004)
      Aircraft observations of Asian outflow from the Transport and Chemical Evolution Over the Pacific (TRACE-P) aircraft mission over the NW Pacific (March and April 2001) show large CH4 enhancements relative to background, ...

    • Continental sources, transoceanic transport, and interhemispheric exchange of carbon monoxide over the Pacific 

      Staudt, A. C.; Jacob, Daniel James; Logan, Jennifer A.; Bachiochi, D.; Krishnamurti, T. N.; Sachse, G. W. (Wiley-Blackwell, 2001)
      The Pacific Exploratory Mission to the Tropics phase B (PEM-Tropics B) aircraft campaign in March-April 1999 surveyed the chemical composition of the Pacific atmosphere from 35°N to 35°S and up to 12 km altitude. We use ...

    • Detection of a lightning influence on tropical tropospheric ozone 

      Martin, Randall V.; Jacob, Daniel James; Logan, Jennifer A.; Ziemke, Jerry M.; Washington, Richard (Wiley-Blackwell, 2000)
      Empirical orthogonal functions (EOFs) are used to analyze a 14-year record of tropical tropospheric ozone columns (TTOCs) determined from satellite measurements. The first EOF explains 54% of TTOC variance and represents ...

    • Effect of rising Asian emissions on surface ozone in the United States 

      Jacob, Daniel James; Logan, Jennifer A.; Murti, Prashant P. (Wiley-Blackwell, 1999)
      The effect of increasing fossil fuel combustion in eastern Asia on surface O3 air pollution in the United States is examined with a global three-dimensional tropospheric chemistry model. Tripling of Asian anthropogenic ...

    • Factors regulating ozone over the United States and its export to the global atmosphere 

      Jacob, Daniel James; Logan, Jennifer A.; Gardner, Geraldine M.; Yevich, Rose M.; Spivakovsky, Clarisa M.; Wofsy, Steven Charles; Sillman, Sanford; Prather, Michael J. (Wiley-Blackwell, 1993)
      The factors regulating summertime O over the United States and its export to the global atmosphere are examined with a 3‐month simulation using a continental scale, three‐dimensional photochemical model. It is found that ...

    • Fire and Biofuel Contributions to Annual Mean Aerosol Mass Concentrations in the United States 

      Park, Rokjin J.; Jacob, Daniel J.; Logan, Jennifer A. (Elsevier, 2007)
      We estimate the contributions from biomass burning (summer wildfires, other fires, residential biofuel, and industrial biofuel) to seasonal and annual aerosol concentrations in the United States. Our approach is to use ...

    • First Directly Retrieved Global Distribution of Tropospheric Column Ozone from GOME: Comparison with the GEOS-CHEM Model 

      Liu, Xiong; Chance, Kelly V.; Sioris, Christopher E.; Kurosu, Thomas Paul; Spurr, Robert J.D.; Martin, Randall V.; Fu, Tzung-May; Logan, Jennifer A.; Jacob, Daniel J.; Palmer, Paul I.; Newchurch, Michael J.; Megretskaia, Inna A.; Chatfield, Robert B. (American Geophysical Union, 2006)
      We present the first directly retrieved global distribution of tropospheric column ozone from Global Ozone Monitoring Experiment (GOME) ultraviolet measurements during December 1996 to November 1997. The retrievals clearly ...

    • Global Budget of Ethane and Regional Constraints on U.S. Sources 

      Xiao, Yaping; Logan, Jennifer A.; Jacob, Daniel J.; Hudman, Rynda C.; Yantosca, Robert M.; Blake, Donald R. (American Geophysical Union, 2008)
      We use a 3-D chemical transport model (the GEOS-Chem CTM) to evaluate a global emission inventory for ethane (C2H6), with a best estimate for the global source of 13 Tg yr−1, 8.0 Tg yr−1 from fossil fuel production, 2.6 ...

    • Global chemical model analysis of biomass burning and lightning influences over the South Pacific in austral spring 

      Staudt, Amanda C.; Jacob, Daniel James; Logan, Jennifer A.; Bachiochi, David; Krishnamurti, T; Poisson, Nathalie (Wiley-Blackwell, 2002)
      A global three-dimensional model of tropospheric chemistry driven by reanalyzed European Centre for Medium-Range Weather Forecasts meteorological data is used to examine the sources of O3, CO, and nitrogen oxides (NOx = ...

    • Global Estimates of CO Sources with High Resolution by Adjoint Inversion of Multiple Satellite Datasets (MOPITT, AIRS, SCIAMACHY, TES) 

      Kopacz, M.; Jacob, Daniel J.; Fisher, John; Logan, Jennifer A.; Zhang, L.; Megretskaia, Inna A.; Yantosca, Robert M.; Singh, K.; Henze, D. K.; Burrows, J. P.; Buchwitz, M.; Khlystova, I.; McMillan, W. W.; Gille, J. C.; Edwards, D. P.; Eldering, A.; Thouret, V.; Nedelec, P. (European Geosciences Union, 2010)
      We combine CO column measurements from the MOPITT, AIRS, SCIAMACHY, and TES satellite instruments in a full-year (May 2004–April 2005) global inversion of CO sources at 4°×5° spatial resolution and monthly temporal resolution. ...

    • Global inventory of sulfur emissions with 1°×1° resolution 

      Spiro, Peter A.; Jacob, Daniel James; Logan, Jennifer A. (Wiley-Blackwell, 1992)
      A global inventory of gaseous sulfur emissions with 1°×1° resolution is described. Emissions from fuel combustion and industrial activities are estimated for countries where no detailed inventories are available by using ...

    • Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation 

      Bey, Isabelle; Jacob, Daniel James; Yantosca, Robert M.; Logan, Jennifer A.; Field, Brendan D.; Fiore, Arlene M.; Li, Qinbin; Liu, Honguy Y.; Mickley, Loretta J.; Schultz, Martin G. (Wiley-Blackwell, 2001)
      We present a first description and evaluation of GEOS-CHEM, a global threedimensional (3-D) model of tropospheric chemistry driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) ...

    • Global simulation of tropospheric O 3 -NO x -hydrocarbon chemistry: 3. Origin of tropospheric ozone and effects of nonmethane hydrocarbons 

      Wang, Yuhang; Jacob, Daniel James; Logan, Jennifer A. (Wiley-Blackwell, 1998)
      A global three-dimensional model of tropospheric O3-NOx-hydrocarbon chemistry is used to investigate the factors controlling ozone concentrations in the troposphere. Model results indicate a close balance between chemical ...

    • Global simulation of tropospheric O3-NOx-hydrocarbon chemistry: 1. Model formulation 

      Wang, Yuhang; Jacob, Daniel James; Logan, Jennifer A. (Wiley-Blackwell, 1998)
      We describe a global three-dimensional model for tropospheric O3-NOx-hydrocarbon chemistry with synoptic-scale resolution. A suite of 15 chemical tracers, including O3, NOx, PAN, HNO3, CO, H2O2, and various hydrocarbons, ...

    • Global simulation of tropospheric O3-NOx-hydrocarbon chemistry: 2. Model evaluation and global ozone budget 

      Wang, Yuhang; Logan, Jennifer A.; Jacob, Daniel James (Wiley-Blackwell, 1998)
      Results from a global three-dimensional model for tropospheric O3-NOx-hydrocarbon chemistry are presented and evaluated with surface, ozonesonde, and aircraft measurements. Seasonal variations and regional distributions ...