Thermally driven day classification

Knowledge graph centered on Thermally driven day classification with 54 nodes and 155 connections. Top connected: snowpack persistence, leaf water content, streamflow, elevation gradient, Upper Colorado River Basin.

Method synopsis

Classification system for identifying and categorizing thermally driven wind days based on diurnal wind direction patterns. Distinguishes between short and long upvalley wind duration based on timing of wind direction reversal.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure as described in the canonical source

Steps below were extracted from the paper that introduces this protocol — The short life of upvalley wind in a high-altitude valley in the Colorado Rocky Mountains (2025), Journal of Geophysical Research: Atmospheres. Implementations in other papers (listed below) may differ.

1. Select thermally driven days
   Identify days during warm season showing distinct thermally driven wind pattern with persistent downvalley wind at least 2 hours before sunrise and shift to upvalley wind within 3 hours after sunrise at both Avery Picnic and Kettle Ponds. Classify selected days into short upvalley wind (less than 5 consecutive hours) and long upvalley wind (more than 5 hours) categories.
   Quantities: 102 days total (79 short UV wind days, 16 long UV wind days) out of more than 75% of warm season daysDuration: Selection covers warm season period when valley floor free of snowConditions: Warm season only, excludes days with significant cloud cover or precipitation that could mask thermally driven signals
   Equipment: wind direction data from surface stations

Typical Equipment

• wind direction data from surface stations

Output Measurements

• wind direction classification
• upvalley wind duration
• thermally driven day identification

Papers Using This Protocol (1)

Places Where Used