تقرير
Thermospheric Temperature and ΣO/N2 Variations as Observed by GOLD and Compared to MSIS and WACCM-X Simulations During 2019–2020 at Deep Solar Minimum
| العنوان: | Thermospheric Temperature and ΣO/N2 Variations as Observed by GOLD and Compared to MSIS and WACCM-X Simulations During 2019–2020 at Deep Solar Minimum |
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| المؤلفون: | Guiping Liu, Douglas E. Rowland, Quan Gan, Han-Li Liu, Jeffrey H. Klenzing, Scott L. England, Richard W. Eastes |
| المصدر: | JGR: Space Physics. 128(6) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Space Sciences (General), Physics (General) |
| الوصف: | The ultraviolet-imaging spectrograph that comprises Global-scale Observations of the Limb and Disk (GOLD) mission in geostationary orbit at 47.5°W longitude has taken full disk images at high cadence throughout the deep solar minimum period of 2019–2020. Synoptic (i.e., concurrent and spatially unified and resolved) observations of thermospheric temperature and composition at ∼150 km altitude are made for the first time, allowing GOLD to disambiguate temporal and spatial variations. Here we analyze the daytime effective temperature and column integrated O and N2 density ratio (ΣO/N2) data simultaneously observed by GOLD over 120°W–20°E longitude and 60°S–60°N latitude from 13 October 2019 to 12 October 2020. Daily zonal mean values are calculated for each latitude and compared with NRLMSIS 2.0 and simulations from the Whole Atmosphere Community Climate Model with thermosphere and ionosphere extension (WACCM-X). On average, the GOLD observations show higher temperatures than Mass Spectrometer Incoherent Scatter radar (MSIS) and WACCM-X by ∼20–60 K (5%–10%) and 80–120 K (12%–18%), respectively. The ΣO/N2 ratios observed by GOLD are larger than the MSIS results by ∼0.4 (40%) but smaller than the WACCM-X simulations by ∼0.3 (30%). The observed and modeled results are correlated at most latitudes (r = 0.4–0.8), and GOLD, MSIS, and WACCM-X all display a similar seasonal variation and change with latitude. WACCM-X simulates a larger annual variation in ΣO/N2, suggesting that the thermospheric circulation is overestimated and atmospheric waves and turbulence transport are not properly represented in the model. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 2169-9402 |
| DOI: | 10.1029/2023JA031560 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20230008055 |
| ملاحظات: | 565555.04.01.01 936723.02.01.12.42 SPEC5732 80GSFC18C0061 80NSSC20K072 80NSSC20K1323 80NSSC22K1018 80NSSC20K0721 |
| رقم الأكسشن: | edsnas.20230008055 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 21699402 |
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| DOI: | 10.1029/2023JA031560 |