M A K Khalil

Summary

Affiliation: Portland State University
Country: USA

Publications

  1. ncbi request reprint Atmospheric methane: trends and cycles of sources and sinks
    M Aslam Khan Khalil
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 41:2131-7. 2007
  2. ncbi request reprint Atmospheric nitrous oxide: patterns of global change during recent decades and centuries
    M A K Khalil
    Department of Physics, Portland State University, OR 97207 0751, USA
    Chemosphere 47:807-21. 2002
  3. ncbi request reprint Atmospheric perfluorocarbons
    M Aslam
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 37:4358-61. 2003
  4. ncbi request reprint Changes in the regional emissions of greenhouse gases and ozone-depleting compounds
    M Aslam K Khalil
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 38:364-6. 2004
  5. ncbi request reprint A new model of tropospheric hydroxyl radical concentrations
    Kiren Bahm
    Department of Physics, Portland State University, SB2 Room 246, P O Box 751, 1719 SW 10th Avenue, Portland, OR 97207 0751, USA
    Chemosphere 54:143-66. 2004
  6. ncbi request reprint Correction for water vapor in the measurement of atmospheric trace gases
    C L Butenhoff
    Department of Physics, Portland State University, OR 97207 0751, USA
    Chemosphere 47:823-36. 2002
  7. ncbi request reprint Global methane emissions from terrestrial plants
    Christopher L Butenhoff
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 41:4032-7. 2007

Collaborators

  • Kiren Bahm
  • Christopher L Butenhoff
  • M Aslam
  • C L Butenhoff
  • John M Prins
  • Martha J Shearer
  • K Khalil
  • John A Culbertson
  • Reinhold A Rasmussen
  • Eric P Grimsrud

Detail Information

Publications7

  1. ncbi request reprint Atmospheric methane: trends and cycles of sources and sinks
    M Aslam Khan Khalil
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 41:2131-7. 2007
    ..These conclusions are derived from the accumulated global observations that now span 23 years and define the role of human activities in the recent cycle of atmospheric methane...
  2. ncbi request reprint Atmospheric nitrous oxide: patterns of global change during recent decades and centuries
    M A K Khalil
    Department of Physics, Portland State University, OR 97207 0751, USA
    Chemosphere 47:807-21. 2002
    ..The ice core data show that N2O started increasing only during the 20th century. The data presented here represent a comprehensive view of the present global distribution of N20 and its historical and recent trends...
  3. ncbi request reprint Atmospheric perfluorocarbons
    M Aslam
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 37:4358-61. 2003
    ..The effect of the falling emission factor is partially offset by increased production and increasing use by the semiconductor industry...
  4. ncbi request reprint Changes in the regional emissions of greenhouse gases and ozone-depleting compounds
    M Aslam K Khalil
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 38:364-6. 2004
    ....
  5. ncbi request reprint A new model of tropospheric hydroxyl radical concentrations
    Kiren Bahm
    Department of Physics, Portland State University, SB2 Room 246, P O Box 751, 1719 SW 10th Avenue, Portland, OR 97207 0751, USA
    Chemosphere 54:143-66. 2004
    ..Sensitivity of CO and CH4 oxidation rates to cloud presence shows an inverse relationship to cloud amount and optical depth. Model results are shown to be consistent with results from two other published models...
  6. ncbi request reprint Correction for water vapor in the measurement of atmospheric trace gases
    C L Butenhoff
    Department of Physics, Portland State University, OR 97207 0751, USA
    Chemosphere 47:823-36. 2002
    ..002% for the South Pole to over 0.8% for saturated sites. We apply the correction factors to wet nitrous oxide (N2O) mole fractions. The corrected data are more consistent with our understanding of N2O sources...
  7. ncbi request reprint Global methane emissions from terrestrial plants
    Christopher L Butenhoff
    Department of Physics, Portland State University, P O Box 751, Portland, Oregon 97207, USA
    Environ Sci Technol 41:4032-7. 2007
    ..We conclude that methane release from the terrestrial plant community as presently understood does not require major innovations to the global methane budget...