Validation of the CrIS fast physical NH3 retrieval with ground-based FTIR
| Autor: | Kimberly Strong, Martijn Schaap, Denis Tremblay, James W. Hannigan, Mathias Palm, Enrico Dammers, Kevin Hrpcek, Michel Grutter, Nicholas B. Jones, Justus Notholt, Jacob Siemons, Karen Cady-Pereira, Shannon L. Capps, Ivan Ortega, Erik Lutsch, Dan Smale, Jan Willem Erisman, Geoffrey C. Toon, Wolfgang Stremme, Mark W. Shephard |
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| Rok vydání: | 2017 |
| Předmět: |
Detection limit
Atmospheric Science 010504 meteorology & atmospheric sciences Infrared Analytical chemistry Absolute difference 010501 environmental sciences 01 natural sciences Standard deviation Range (statistics) Environmental science Noise level Fourier transform infrared spectroscopy 0105 earth and related environmental sciences Line (formation) Remote sensing |
| Zdroj: | Atmospheric Measurement Techniques. 10:2645-2667 |
| ISSN: | 1867-8548 |
| DOI: | 10.5194/amt-10-2645-2017 |
| Popis: | Presented here is the validation of the CrIS (Cross-track Infrared Sounder) fast physical NH3 retrieval (CFPR) column and profile measurements using ground-based Fourier transform infrared (FTIR) observations. We use the total columns and profiles from seven FTIR sites in the Network for the Detection of Atmospheric Composition Change (NDACC) to validate the satellite data products. The overall FTIR and CrIS total columns have a positive correlation of r = 0.77 (N = 218) with very little bias (a slope of 1.02). Binning the comparisons by total column amounts, for concentrations larger than 1.0 × 1016 molecules cm−2, i.e. ranging from moderate to polluted conditions, the relative difference is on average ∼ 0–5 % with a standard deviation of 25–50 %, which is comparable to the estimated retrieval uncertainties in both CrIS and the FTIR. For the smallest total column range ( |
| Databáze: | OpenAIRE |
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