World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Impacts of Updated Spectroscopy on Thermal Infrared Retrievals of Methane Evaluated with Hippo Data : Volume 7, Issue 9 (29/09/2014)

By Alvarado, M. J.

Click here to view

Book Id: WPLBN0004000027
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: Impacts of Updated Spectroscopy on Thermal Infrared Retrievals of Methane Evaluated with Hippo Data : Volume 7, Issue 9 (29/09/2014)  
Author: Alvarado, M. J.
Volume: Vol. 7, Issue 9
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany

Citation

APA MLA Chicago

Cady-Pereira, K. E., Wecht, K. J., Hegarty, J. D., Kulawik, S. S., Wofsy, S. C., Worden, J. R.,...Payne, V. H. (2014). Impacts of Updated Spectroscopy on Thermal Infrared Retrievals of Methane Evaluated with Hippo Data : Volume 7, Issue 9 (29/09/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Atmospheric and Environmental Research, Lexington, Massachusetts, USA. Errors in the spectroscopic parameters used in the forward radiative transfer model can introduce altitude-, spatially-, and temporally-dependent biases in trace gas retrievals. For well-mixed trace gases such as methane, where the variability of tropospheric mixing ratios is relatively small, reducing such biases is particularly important. We use aircraft observations from all five missions of the HIAPER Pole-to-Pole Observations (HIPPO) of the Carbon Cycle and Greenhouse Gases Study to evaluate the impact of updates to spectroscopic parameters for methane (CH4), water vapor (H2O), and nitrous oxide (N2O) on thermal infrared retrievals of methane from the NASA Aura Tropospheric Emission Spectrometer (TES). We find that updates to the spectroscopic parameters for CH4 result in a substantially smaller mean bias in the retrieved CH4 when compared with HIPPO observations. After an N2O-based correction, the bias in TES methane upper tropospheric representative values for measurements between 50° S and 50° N decreases from 56.9 to 25.7 ppbv, while the bias in the lower tropospheric representative value increases only slightly (from 27.3 to 28.4 ppbv). For retrievals with less than 1.6 DOFS, the bias is reduced from 26.8 to 4.8 ppbv. We also find that updates to the spectroscopic parameters for N2O reduce the errors in the retrieved N2O profile.

Summary
Impacts of updated spectroscopy on thermal infrared retrievals of methane evaluated with HIPPO data

Excerpt
Alvarado, M. J., Cady-Pereira, K. E., Xiao, Y., Millet, D. B., and Payne, V. H.: Emission ratios for ammonia and formic acid and observations of Peroxy Acetyl Nitrate (PAN) in biomass burning smoke as seen by the Tropospheric Emission Spectrometer (TES), Atmosphere, 2, 633–654, doi:10.3390/atmos2040633, 2011.; Alvarado, M. J., Payne, V. H., Mlawer, E. J., Uymin, G., Shephard, M. W., Cady-Pereira, K. E., Delamere, J. S., and Moncet, J.-L.: Performance of the Line-By-Line Radiative Transfer Model (LBLRTM) for temperature, water vapor, and trace gas retrievals: recent updates evaluated with IASI case studies, Atmos. Chem. Phys., 13, 6687–6711, doi:10.5194/acp-13-6687-2013, 2013.; Anderson, G. P., Clough, S. A., Kneizys, F. X., Chetwynd, J. H., and Shettle, E. P.: AFGL Atmospheric Constituent Profiles (0–120 km), Technical Report AFGL-TR-86-0110, Air Force Geophysics Laboratory, Hanscom AFB, MA, USA, 43 pp., 1986.; Beer, R., Glavich, T. A., and Rider, D. M.: Tropospheric emission spectrometer for the Earth Observing System's Aura satellite, Appl. Optics, 40, 2356–2367, 2001.; Bergamaschi, P., Frankenberg, C., Meirink, J. F., Krol, M., Dentener, F., Wagner, T., Platt, U., Kaplan, J. O., Korner, S., Heimann, M., Dlugokencky, E. J., and Goede, A.: Satellite chartography of atmospheric methane from SCIAMACHY on board ENVISAT: 2. Evaluation based on inverse model simulations, J. Geophys. Res., 112, D02304, doi:10.1029/2006JD007268, 2007.; Bergamaschi, P., Frankenberg, C., Meirink, J. F., Krol, M., Villani, M. G., Houweling, S., Dentener, F., Dlugokencky, E. J., Miller, J. B., Gatti, L. V., Engel, A., and Levin, I.: Inverse modeling of global and regional CH4 emissions using SCIAMACHY satellite retrievals, J. Geophys. Res., 114, D22301, doi:10.1029/2009JD012287, 2009.; Bowman, K. W., Rodgers, C. D., Sund-Kulawik, S., Worden, J., Sarkissian, E., Osterman, G., Steck, T., Luo, M., Eldering, A., Shephard, M. W., Worden, H., Clough, S. A., Brown, P. D., Rinsland, C. P., Lampel, M., Gunson, M., and Beer, R.: Tropospheric emission spectrometer: retrieval method and error analysis, IEEE Geosci. Remote S., 44, 1297–1307, doi:10.1109/TGRS.2006.871234, 2006.; Brasseur, G. P., Hauglustaine, D. A., Walters, S., Rasch, P. J., Müller, J.-F., Granier, C., and Tie, X. X.: MOZART, a global chemical transport model for ozone and related chemical tracers: 1. Model description, J. Geophys. Res., 103, 28265–28289, doi:10.1029/98JD02397, 1998.; Cady-Pereira, K. E., Shephard, M. W., Millet, D. B., Luo, M., Wells, K. C., Xiao, Y., Payne, V. H., and Worden, J.: Methanol from TES global observations: retrieval algorithm and seasonal and spatial variability, Atmos. Chem. Phys., 12, 8189–8203, doi:10.5194/acp-12-8189-2012, 2012.; Cady-Pereira, K. E., Chaliyakunnel, S., Shephard, M. W., Millet, D. B., Luo, M., and Wells, K. C.: HCOOH measurements from space: TES retrieval algorithm and observed global distribution, Atmos. Meas. Tech., 7, 2297–2311, doi:10.5194/amt-7-2297-2014, 2014.; Ciais, P., Sabine, C., Bala, G., Bopp, Brovkin, L. V., Canadell, J., Chhabra, A., DeFries, R., Galloway, J., Heimann, M., Jones, C., Le Queìreì, C., Myneni, R. B., Pia, S., and Thornton, P.: Carbon and other biogeochemical cycles, in: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Pla

 

Click To View

Additional Books


  • Observations of So2 and No2 by Mobile Do... (by )
  • A Depolarisation Lidar Based Method for ... (by )
  • Resolution of an Important Discrepancy B... (by )
  • Validation of Iasi Forli Carbon Monoxide... (by )
  • Retrieval of Three-dimensional Wind Fiel... (by )
  • Impact of Satellite Viewing Swath Width ... (by )
  • Looking Through the Haze: Evaluating the... (by )
  • Feasibility of Polarized All-sky Imaging... (by )
  • An Assessment of the Performance of a 1.... (by )
  • Improving Accuracy and Precision of Ice ... (by )
  • An Introduction to the Fy3 Gnos Instrume... (by )
  • Doas Measurements of No2 from an Ultrali... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.