Iskar Helm Wind

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Iska mai suna, Helm iskar, iskar ce mai suna a Cumbria, Ingila,New Scientist Premium- Histories: When the helm wind blows - Histories iska ce mai karfi daga arewa maso gabas wacce ke kaɗa gangar kudu maso yamma na Cross Fell escarpment. Ita ce kawai iska mai suna acikin Tsibirin Biritaniya, ko da yake yawancin yankuna na tsaunuka a yankin Biritaniya suna nuna irin wannan al'amari lokacin da  yanayi yayi kyau. Yana iya ɗaukar sunan sa daga kwalkwali ko hular girgije wanda ke samuwa a sama da Cross Fell, wanda aka sani da Bar Helm, tunda layin girgije a kan faɗuwar ruwa na iya hango ko hasashen tare da Helm. Gordon Manley ne ya gudanar da bincike kan iskar helm acikin shekarar 1930s. Ya fassara al'amarin acikin sharuɗɗan,hydrodynamic a matsayin "tsayewar igiyar ruwa "da" "rotor", samfurin da aka tabbatar acikin, shekarar ta 1939 ta hanyar jiragen saman glider.David Uttley, The Anatomy of the Helm Wind, Bookcase, 1998

Dale a kan kwarin Eden yana da nasa Helm Wind, wanda ke mamaye Mallerstang Edge, musamman yana shafar tsakiyar dale. Wannan na iya zama mai zafi kamar haka, kuma yana iya yin busa na tsawon kwanaki biyu ko fiye da haka, wani lokaci yana jin kamar jirgin ƙasa mai saurin tashi. Kamar yadda iskar ta ke a Cross Fell, isowarsa yana tare da samuwar wata babbar gajimare (wani "Helm Bar") wanda, a wannan yanayin, ya kasance tare da babban ƙasa a gefen gabas na dale.

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