دورية أكاديمية
The SPARC Water Vapor Assessment II: assessment of satellite measurements of upper tropospheric humidity
| العنوان: | The SPARC Water Vapor Assessment II: assessment of satellite measurements of upper tropospheric humidity |
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| المؤلفون: | W. G. Read, G. Stiller, S. Lossow, M. Kiefer, F. Khosrawi, D. Hurst, H. Vömel, K. Rosenlof, B. M. Dinelli, P. Raspollini, G. E. Nedoluha, J. C. Gille, Y. Kasai, P. Eriksson, C. E. Sioris, K. A. Walker, K. Weigel, J. P. Burrows, A. Rozanov |
| المصدر: | Atmospheric Measurement Techniques, Vol 15, Pp 3377-3400 (2022) |
| بيانات النشر: | Copernicus Publications, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Environmental engineering LCC:Earthwork. Foundations |
| مصطلحات موضوعية: | Environmental engineering, TA170-171, Earthwork. Foundations, TA715-787 |
| الوصف: | Nineteen limb-viewing data sets (occultation, passive thermal, and UV scattering) and two nadir upper tropospheric humidity (UTH) data sets are intercompared and also compared to frost-point hygrometer balloon sondes. The upper troposphere considered here covers the pressure range from 300–100 hPa. UTH is a challenging measurement, because concentrations vary between 2–1000 ppmv (parts per million by volume), with sharp changes in vertical gradients near the tropopause. Cloudiness in this region also makes the measurement challenging. The atmospheric temperature is also highly variable ranging from 180–250 K. The assessment of satellite-measured UTH is based on coincident comparisons with balloon frost-point hygrometer sondes, multi-month mapped comparisons, zonal mean time series comparisons, and coincident satellite-to-satellite comparisons. While the satellite fields show similar features in maps and time series, quantitatively they can differ by a factor of 2 in concentration, with strong dependencies on the amount of UTH. Additionally, time-lag response-corrected Vaisala RS92 radiosondes are compared to satellites and the frost-point hygrometer measurements. In summary, most satellite data sets reviewed here show on average ∼30 % agreement amongst themselves and frost-point data but with an additional ∼30 % variability about the mean bias. The Vaisala RS92 sonde, even with a time-lag correction, shows poor behavior for pressures less than 200 hPa. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1867-1381 1867-8548 |
| Relation: | https://amt.copernicus.org/articles/15/3377/2022/amt-15-3377-2022.pdf; https://doaj.org/toc/1867-1381; https://doaj.org/toc/1867-8548 |
| DOI: | 10.5194/amt-15-3377-2022 |
| URL الوصول: | https://doaj.org/article/41ffab6714234b21aac53afa46812a52 |
| رقم الأكسشن: | edsdoj.41ffab6714234b21aac53afa46812a52 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 18671381 18678548 |
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| DOI: | 10.5194/amt-15-3377-2022 |