Kunzwisisa Magnetic Field yePasi
ziviso
Simba remagineti rePasi, rinowanzonzi munda wegeomagnetic, chinhu chakaoma uye chinonakidza. Richifukidza pasi redu, rinotangira mukati kuenda muchadenga, richikanganisa zvikuru hupenyu hwePasi. Chidziviriro ichi chinodzivirira mhepo yezuva inoumbwa nezvidimbu zvinochajwa uye chinoita kuti kufamba nepakati pemakompasi kuenderere mberi, kuchipesvedzera maitiro akasiyana-siyana echisikigo uye masisitimu etekinoroji. Chinyorwa chino chinotarisa kuoma kwesimba remagineti rePasi, chichiongorora mavambo aro, hunhu hwaro, kukosha kwaro, uye kuvimba kwaro nevanhu vemazuva ano.
Mavambo eMunda weMagineti wePasi
Simba remagineti repasi rinogadzirwa zvakanyanya mukati mepakati penyika. Musoro, unonyanya kuumbwa nesimbi nenickel, une musimboti wemukati wakasimba uye musimboti wekunze wakanyungudutswa. Munda wegeomagnetic unotanga kuburikidza nemaitiro akafanana nedhinamo inozviraramisa: kufamba kwemusimboti wekunze wemvura kunogadzira magetsi, ayo anozogadzira simba remagineti.
Dzidziso huru inotsanangura chiitiko ichi idzidziso ye geodynamo. Sezvo Nyika ichitenderera, inogadzira kufamba kwakaoma mukati mesimbi yakanyungudutswa uye nickel. Kufamba uku, pamwe chete neCoriolis effect—inobva mukutenderera kweNyika—kunogadzira kuyerera kwehelical kunoburitsa magetsi emagetsi. Zvadaro, magetsi aya anokonzera simba remagineti, zvichiratidza kubatana kwekufamba kwemvura uye electromagnetism mukati mepakati.
Hunhu hweMagineti ePasi
Simba remagineti repasi rinoshanduka-shanduka, rinoratidzwa nemunda waro wevector, zvichireva kuti rine hukuru uye gwara chero kupi zvako. Munda uyu wakafanana nemuenzaniso we dipole une pole remagineti rekuchamhembe nerekumaodzanyemba, uko mitsetse yemunda inobuda padanda rimwe yosangana kune rimwe. Zvisinei, tsananguro iyi ye dipole inorerutsa: munda chaiwo unoratidza kuomarara kwakanyanya, uine zvikamu zvakawanda uye zvisina kunaka.
Simba remagineti rinoyerwa uchishandisa mayuniti anonzi teslas (T) kana gauss (G), ne tesla imwe chete yakaenzana ne gauss 10,000. Kazhinji, simba resimba remagineti pamusoro peNyika rinotangira pa25 kusvika 65 microteslas (0.25 kusvika 0.65 gauss).
Uyezve, munda wemagineti unogara uchichinja-chinja uye kuchinja zvishoma nezvishoma, kunonzi kusiyana kwenyika. Kuchinja uku kunobva mukufamba kwemvura mukati memukati uye kunogona kutungamira kuzviitiko zvakaita sekuchinja kwegineti—kuchinja kamwe kamwe mumunda wemagineti.
Matanda Emagineti Nekufamba Kwawo
Mapore emagineti haaenderane zvakakwana nepore dzenzvimbo uye anoramba achifambiswa. Pore remagineti rekuchamhembe, iro riri pedyo neCanadian Arctic parizvino, rave richitama richienda kuRussia nekumhanya kwemakiromita angangoita makumi mana pagore. Kufamba uku kunobva mukusimba kwemaitiro egeodynamo.
Kudzoserwa kwematanda epasi (pole reversal) chimwe chinhu chinonakidza chesimba remagineti rePasi. Munguva dzemageological, matanda aya akadzoserwa shure kakawanda, uye kudzoserwa kukuru kwekupedzisira kwakaitika makore angangoita 780,000 apfuura. Munguva yekudzoserwa, simba remagineti rinopera simba, richiva rakaoma uye rinogona kuva nematanda akawanda risati ragadzira chimiro chitsva chedipole.
Basa reMagnetosphere
Pasi rose rakatenderedza, magnetosphere inoumbwa kuburikidza nekudyidzana kuripo pakati pemunda we geomagnetic nemhepo yezuva. Nzvimbo iyi inotambanukira zviuru zvemakiromita muchadenga uye inoshanda sefuro rinodzivirira, richibvisa zvidimbu zvine simba kubva kuzuva. Kushanda kwemagnetosphere pakudzivirira pasi kwakakosha pakuchengetedza mhepo yePasi uye kuchengetedza hupenyu kubva kumwaranzi yezuva nemwaranzi yemuchadenga.
Mukati memagnetosphere, kune zvimiro zvakakosha zvakasiyana-siyana, kusanganisira mabhandi emwaranzi eVan Allen. Mabhandi aya inzvimbo dzine zvidimbu zvine simba rakawanda zvakavharirwa, kunyanya maerekitironi, nemapurotoni, izvo zvinopa matambudziko kune masateliti nevanofamba muchadenga.
Chimwe chinhu chakakosha imagnetotail, nzvimbo yakareba yakatambanudzwa padivi reusiku rePasi, yakatarisana nezuva. Magnetotail inoita basa guru mumabasa akadai semadutu egeomagnetic uye auroras—chiedza chechisikigo chinokwezva pedyo nenzvimbo dzepolar dzinobva muzvimedu zvine chaji zvinosangana nemhepo.
Kukosha Kuhupenyu Nemabasa Evanhu
Simba remagineti repasi rinoshanda sechinhu chakakosha pahupenyu nemabasa evanhu munzira dzakawanda. Chekutanga, rinobatsira kuchengetedza ozone layer nekudzivirira mwaranzi yezuva neyapasi, nokudaro richichengetedza nharaunda yakagadzikana inokwanisa kutsigira nharaunda dzakasiyana-siyana.
Pamusoro pezvo, munda wemagineti wakagonesa kufamba kwemazana emakore. Makompasi, maturusi ekutanga ekufambisa, anovimba nesimba remagineti rePasi kuti awane gwara rekutungamira. Munguva pfupi yapfuura, simba remagineti rinobatsira mukufamba kwemazuva ano uye masisitimu ekutaurirana, achinyanya kuzivikanwa mukuongorora ndege, zvegungwa, uye zvepasi.
Uyezve, masayendisiti anoshandisa simba remagineti pakudzidza nezvemaplate tectonics uye pakuita tsvakiridzo yepaleomagnetic. Matombo eSedimentary ane ruzivo rwenhoroondo yenzvimbo dzegeomagnetic, zvichipa ruzivo rwekudonha kwemakondinendi uye nhoroondo yegeology.
Matambudziko Emazuva Ano uye Tsvagiridzo
Ongororo yazvino pamusoro pesimba remagineti rePasi inosanganisira kutarisa shanduko dzaro kuburikidza nemabasa esatellite, kunyanya boka renyeredzi reEuropean Space Agency (ESA) Swarm. Kunzwisisa kusiyana kwepasi, kufamba kwenzvimbo, uye maitiro anogona kukonzera kudzoka kwezvinhu zvakakosha zvikuru.
Pamusoro pezvo, masayendisiti anoongorora kukanganisa kwemamiriro ekunze muchadenga pasimba remagineti, kunyanya vachitarisa pa coronal mass ejections (CMEs) uye solar flares—zviitiko zvinogona kukanganisa magnetosphere, satellites, uye masisitimu ekutaurirana. Kugadzira mamodheru ekufanotaura uye nzira dzekuderedza kukanganisa kwemamiriro ekunze muchadenga kwakakosha pakusimudzira kusimba munharaunda yedu iri kuramba ichivimba netekinoroji.
mhedziso
Simba remagineti rePasi isimba rakaoma, rinokosha, uye rinoshanduka-shanduka, rinodzivirira pasi, rinobatsira kufamba, uye rinopesvedzera masisitimu akasiyana-siyana echisikigo neakagadzirwa nevanhu. Kunzwisisa hunhu, maitiro, uye zvinorehwa nemunda wegeomagnetic kunomiririra basa guru resainzi. Kuenderera mberi nekutsvaga uye maturusi etekinoroji anovimbisa kuburitsa pachena zvimwe zvakavanzika zvakatenderedza chikamu ichi chakavanzika asi chakakosha zvikuru chepasi redu, tichiona kuti tinoramba tichiziva uye takagadzirira chero chiitiko chegeomagnetic chingamuka. Sezvo kunzwisisa kwedu kuchikura, ndiko kunoitawo kugona kwedu kuenderana nemaitiro epasi anochengetedza hupenyu paPasi.
