आर्कटिक महासागर
thumb|250px|arkatik mahasagar thumb|250px|arkatik mahasagar uttar dhruviy mahasagar athava 'arkatik mahasagar (aangrezi: Arctic Ocean) prithvi ke uttari golardh mean sthit hai. isaka vistar adhikatar arkatik uttar dhruviy kshetr mean hai. vishv ke paanch pramukh samudri prabhagoan arthath paanch mahasagaroan mean se yah sabase chhota aur uthala mahasagar hai. 'aantarrashtriy jal sarvekshan sangathan' (aee.ech.o.) isako ek mahasagar ke roop mean svikar karata hai, jabaki kuchh mahasagar vijnani ise 'arkatik bhoomadhy sagar' ya keval 'arkatik sagar' kahakar hi sambodhit karate haian. vijnani arkatik ko 'andh mahasagar' ke bhoomadhy sagaroan me se ek manate haian.
vistar
yah mahasagar lagabhag poori tarah se yooreshiya aur uttari amerika se ghira hua hai. arkatik mahasagar aanshik roop se sal bhar mean samudri barph se dhaka rahata hai aur sardiyoan mean lagabhag poorn roop se barph se achchhadit ho jata hai. is mahasagar ka tapaman aur lavanata mausam ke anusar badalati rahati hai, kyoanki isaki barph pighalati aur jamati rahati hai. paanch pramukh mahasagaroan mean se isaki ausat lavanata sabase kam hai, jisaka karan kam vashpikaran, nadiyoan aur dharaoan se bhari matra mean ane vala mitha pani aur uchch lavanata vale mahasagaroan se simit ju dav hai, jisake karan yahaan ka pani bahut kam matra mean in uchch lavanata vale mahasagaroan mean bah kar jata hai.
grishm kal mean yahaan ki lagabhag 50% barph pighal jati hai. 'rashtriy him aur barph aank da kendr', upagrah aank doan ka prayog kar arkatik samudri barph avaran aur isake pighalane ki dar ke pichhale saloan ke aank doan ke adhar par ek tulanatmak dainik rik aaurd pradan karata hai.
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