Report
A Second-Order Closure Turbulence Model: New Heat Flux Equations and No Critical Richardson Number
| العنوان: | A Second-Order Closure Turbulence Model: New Heat Flux Equations and No Critical Richardson Number |
|---|---|
| المؤلفون: | Y. Cheng, V. M. Canuto, A. M. Howard, A. S. Ackerman, M. Kelley, A. M. Fridlind, G. A. Schmidt, M. S. Yao, G. S. Elsaesser |
| المصدر: | Journal of the Atmospheric Sciences. 77(8) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Meteorology And Climatology |
| الوصف: | We formulate a new second-order closure turbulence model by employing a recent closure for the pressure-temperature correlation at the equation level. As a result, we obtain new heat flux equations that avoid the long-standing issue of a finite critical Richardson number. The new, structurally simpler model improves on the Mellor-Yamada 1982 and Galperin et al. 1988 models; key feature includes enhanced mixing under stable conditions facilitating agreement with observational, experimental and high-resolution numerical data sets. The model predicts a planetary boundary layer height deeper than predicted by models with low critical Richardson numbers, as demonstrated in single column model runs of the GISS ModelE general circulation model. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 1520-0469 0022-4928 |
| DOI: | 10.1175/JAS-D-19-0240.1 |
| URL الوصول: | https://ntrs.nasa.gov/citations/20205003229 |
| ملاحظات: | 80NSSC17M0057 509496.02.08.09.58 |
| رقم الانضمام: | edsnas.20205003229 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 15200469 00224928 |
|---|---|
| DOI: | 10.1175/JAS-D-19-0240.1 |