Simple equations for temperature simulations on mid-latitude volcanic islands: a case study from Jeju (Republic of Korea)

다국어 초록 (Multilingual Abstract)

Volcanic islands can be characterized by remarkablesurface air temperature variability. The distribution of weather stationsin these settings, however, is typically too sparse to reliably describetemperature patterns which can complicate regional-scale hydrologicanalyses. Here, a simple method is presented to estimate near surfaceair temperatures for such a setting (Jeju Island, Republic of Korea).
The method utilizes temperature lapse rates (TLR; the change intemperature with elevation) which are computed for Tmin, Tave, andTmax for two distinct hemispheres: the more arid northern flanksand the more humid southern flanks of the central orographicdivide. Computed TLRs vary greatly with season and location relativeto the orographic divide and, unlike in continental mountainoussettings, are generally highest for Tmin in winter. Cross-validationresults indicate a good match between modeled and measuredvalues particularly for high altitude stations that are characterizedby highest precipitation rates. Because temporally changing TLRsperform better than the often applied theoretical constant environmentallapse rate of 6.5 °C/km, monthly mean TLRs compiled fromtemperature data from Jeju Island are presented here as proxiesfor surface air temperature simulation efforts in similar settingsfor which only limited climatic data are available.

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