Babban Tasirin Tafkin Gishiri
 Babban Tasirin Tafkin Gishiri | |
|---|---|
| Bayanai | |
| Ƙasa | Tarayyar Amurka |
Babban Salt Lake sakamako ne karamin amma ana iya gano shi a kan yanayi gida da yanayi a kusa da Great Salt Lake a Utah, Amurka. Musamman, dusar ƙanƙara abu ne da ke faruwa a yankin kuma suna da manyan tasirin zamantakewa da tattalin arziki saboda yawan ruwan sama. Babban Tafkin Gishiri kusan ba ya daskarewa kuma yana iya dumi da sauri, wanda ke ba da damar inganta ruwan sama a tafkin daga Satumba zuwa Mayu.[1] Sau da yawa ana danganta guguwar dusar ƙanƙara da ke cikin tafkin don ƙirƙirar abin da aka sani da "Babban dusar ƙara a Duniya".
Inganta tafkin
[gyara sashe | gyara masomin]
Ana samar da dusar ƙanƙara a kusa da Babban Tafkuna Gishiri a cikin irin wannan salon zuwa wasu wurare a duniya. Koyaya, Babban Tafkin Gishiri da farko yana ba da hanyar ɗagawa kuma yana aiki azaman mai saurin yanayi, wanda ke ƙarfafa convection. Wannan ya bambanta da Great Lakes, inda tabkuna ke ba da gudummawa mai yawa na danshi da zafi mai zurfi.
Babban Salt Lake yana faruwa ne lokacin da iska mai karfi, sanyi, ta arewa maso yamma ta hura a fadin tafkin mai dumi. Wannan ya zama ruwan dare bayan wani sanyi gaba wucewa, inda iskõki suka fi yawa daga arewa maso yamma kuma iska ta fi sanyi fiye da tafkin.[1] Lokacin da iska ta tafkin ta hura zuwa tafkin, akwai wani yanki na haɗuwa wanda ke aiki don yin amfani da iska mai sanyi a tsakiyar tafkin kuma ya kara inganta hazo. salinity na Great Salt Lake yana hana daskarewa amma yana rage matsin tururi da kuma yanayin zafi a cikin iska. A sakamakon haka, ana ƙara ƙananan danshi da zafi mai zafi zuwa iska da ke motsawa a kan tafkin. Babban taimako na tsaunukan Wasatch ya kara samun riba a kan inganta tafkin kuma yana iya karɓar ƙafafu da yawa na dusar ƙanƙara daga tasirin tafkin kadai.[1][2]
Yanayin yanayi
[gyara sashe | gyara masomin]Adadin abubuwan da suka faru sun bambanta sosai daga shekara zuwa shekara, bisa ga saitin synoptic. Matsakaicin shine 4 zuwa 5 abubuwan da aka bayyana a kowace shekara da kuma adadin abubuwan da suka faru. Kadan fiye da rabin abubuwan da aka bayyana da kyau sun ci gaba da awanni 13 zuwa 24.[3] A cikin binciken 2000, masu bincike sun gano cewa mafi yawan shari'o'in sun kasance tsakanin Oktoba da Fabrairu, tare da wasu lokuta a watan Satumba da Afrilu ko Mayu. Koyaya, sake dubawa na wasu shari'oʼi da yawa a cikin 2012 ya gano cewa tsawo na aiki ya kasance da gaske a cikin fall (tsakiyar Oktoba zuwa tsakiyar Disamba) da bazara (farkon Afrilu) kuma akwai mafi ƙarancin tsakanin waɗannan matsakaicin.[4] Wannan binciken ya sami matsakaicin abubuwan da suka faru 13 a kowace shekara, da kyau ko a'a an bayyana su da kyau.[4]
Yawancin abubuwan da aka bayyana da kyau suna barin tarin inci 8 (20 ko fiye, kuma a wasu lokuta fiye da inci 40 (100 , tare da hanyar da aka bayyana sosai.[3]
Hasashen tasirin tafkin dusar ƙanƙara
[gyara sashe | gyara masomin]Kwarewar hasashen ta inganta sosai a cikin 'yan shekarun nan saboda ingantaccen cibiyar sadarwa ciki har da tsarin radar na yanayi na NEXRAD. Cikakken tsinkaya ya haɗa da gano mahimman buƙatu don ruwan sama na tasirin tafkin. Abubuwan da ake buƙata sune yanayin da ba shi da kwanciyar hankali, mai mahimmanci da kuma hanyar ɗagawa. Yawancin masu canji daban-daban suna shiga cikin waɗannan buƙatu, wanda ke haifar da taron minti daya da minti daya.[5] Ta hanyar bincike mai zurfi da gwaje-gwaje na filin fahimtar tasirin ruwan sama na tafkin ya inganta sosai a cikin 'yan shekarun nan. An kirkiro ka'idoji da yawa na yatsan hannu don yin hasashen abin da ya faru, wuri da tsananin tasirin dusar ƙanƙara.[6]
Dokokin yatsa
[gyara sashe | gyara masomin]Masu hasashen yankin sun samar da ka'idoji don hango hasashen ci gaban tafkin da aka inganta dusar ƙanƙara: [7][8]
- A strong Northwesterly flow maximizes precipitation for the Salt Lake Valley.
- A minimal temperature difference of 29 °F (16 °C) [ana buƙatar hujja] between the surface and the 700 millibars (70 kPa) height is needed, but not necessarily sufficient in itself to cause lake-effect snow.
- An inversion or stable layer below 700 millibars (70 kPa) has never yielded lake-effect snow.
- Lake-effect snow can occur in concert with synoptic scale storm systems.
- A large lake-land temperature difference favors over-lake convergence.
- Lake-effect is typically initiated during the night when land-breeze convergence is favored and convection occurs predominantly over the lake.
- During the daytime lake-effect precipitation dissipates when solar heating creates scattered widespread convection over the land.
- The 700 mbar winds typically determine the geographic position of the precipitation
- Limited amounts of directional and vertical wind shear tend to produce heavier precipitation events.
- The Great Salt Lake contributes minimal amounts of moisture so that upstream moisture is a crucial variable.
Manazarta
[gyara sashe | gyara masomin]- ↑ 1.0 1.1 1.2 Jackson, Mark. "Forecasting the 31 October 2004 Lake-Effect Snowstorm of the Great Salt Lake" (PDF). WFO Salt Lake City, UT. Retrieved February 20, 2019.
- ↑ Alcott, Trevor; Steenburgh, Jim (July 2013). "Orographic Influences on a Great Salt Lake–Effect Snowstorm". Mon. Wea. Rev. AMS. 141 (7): 2432–2450. Bibcode:2013MWRv..141.2432A. doi:10.1175/MWR-D-12-00328.1. ISSN 0027-0644.
- ↑ 3.0 3.1 Steenburgh, W. J.; Halvorson, S. F.; Onton, D. J. (2000). "Climatology of lake-effect snowstorms of the Great Salt Lake". Mon. Wea. Rev. (in Turanci). 128 (3): 709–727. Bibcode:2000MWRv..128..709S. doi:10.1175/1520-0493(2000)128<0709:COLESO>2.0.CO;2.
- ↑ 4.0 4.1 Alcott, Trevor I.; Steenburgh, W. J.; Laird, Neil F. (2012). "Great Salt Lake–Effect Precipitation: Observed Frequency, Characteristics, and Associated Environmental Factors". Weather and Forecasting (in Turanci). 27 (4): 954–971. Bibcode:2012WtFor..27..954A. doi:10.1175/WAF-D-12-00016.1.
- ↑ "What is lake effect snow? It's impacting Utah, but what does that mean and how does it happen?". 2021. Archived from the original on 2023-03-26. Retrieved 2025-08-01.
- ↑ Steenburgh, W. J.; Halvorson, S. F.; Onton, D. J. (2000). "Climatology of lake-effect snowstorms of the Great Salt Lake". Mon. Wea. Rev. (in Turanci). 128 (3): 709–727. Bibcode:2000MWRv..128..709S. doi:10.1175/1520-0493(2000)128<0709:COLESO>2.0.CO;2.
- ↑ Carpenter, D. M. (1993). "The lake-effect of the Great Salt Lake: Overview and forecast problems". Weather and Forecasting. 8 (2): 181–193. Bibcode:1993WtFor...8..181C. doi:10.1175/1520-0434(1993)008<0181:TLEOTG>2.0.CO;2.
- ↑ Steenburgh, W. J (1999). "Lake Effect of the Great Salt Lake: Scientific Overview and Forecast Diagnostics". Archived from the original on April 25, 2007. Retrieved February 20, 2019.