English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The diurnal variation of regional wind patterns in the complex terrain ofCentral Italy was investigated for summer fair-weather conditions andwinter time periods using a radar wind profiler. The profiler is located ona site where interaction between the complex topography and land-surfaceproduces a variety of thermally and dynamically driven wind systems. Theobservational data set, collected for a period of one year, was used first todescribe the diurnal evolution of thermal driven winds, second to validatethe Mesoscale Model 5 (MM5) that is a three-dimensional numerical model.This type of analysis was focused on the near-surface wind observation,since thermally driven winds occur in the lower atmosphere. According to thevalley wind theory expectations, the site – located on the left sidewall ofthe valley (looking up valley) – experiences a clockwise turning with time.Same characteristics in the behavior were established in both theexperimental and numerical results.<P  style="line-height: 20px;">Because the thermally driven flows can have some depth and may be influencedmainly by model errors, as a third step the analysis focuses on a subset ofcases to explore four different MM5 Planetary Boundary Layer (PBL)parameterizations. The reason is to test how the results are sensitive tothe selected PBL parameterization, and to identify the betterparameterization if it is possible. For this purpose we analysed the MM5output for the whole PBL levels. The chosen PBL parameterizations are: 1)Gayno-Seaman; 2) Medium-Range Forecast; 3) Mellor-Yamada scheme as used inthe ETA model; and 4) Blackadar

Thermally driven circulation in a region of complex topography: comparison of wind-profiling radar measurements and MM5 numerical predictions