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Global • 2026-11-01, 09:22 GMT • ~1 min read

Mars polar crater ice expands and shrinks with the seasons, study finds

تحقیق: مریخ کے قطبی گڑھوں کی برف موسموں کے ساتھ بڑھتی اور گھٹتی ہے

अध्ययन: मंगल के ध्रुवीय गड्ढों की बर्फ मौसमों के साथ बढ़ती और घटती है

Mars polar crater ice expands and shrinks with the seasons, study finds

Key points

اہم نکات

मुख्य बातें

  • Ice deposits inside craters near Mars' northern polar cap grow and shrink with the seasons, a new study of almost two decades of orbiter images has found.
  • Researchers examined 36 craters using NASA's Mars Reconnaissance Orbiter camera from 2006 to 2025 and found bright deposits changed in 32 of them, while four showed no change.
  • The changes were not uniform across craters, suggesting local conditions, not a planet-wide shift, drive the seasonal frost cycle — a finding that could help scientists read Mars' long-term climate history.
  • مریخ کے شمالی قطبی برفانی ٹوپی کے قریب گڑھوں کے اندر برف کے ذخائر موسموں کے ساتھ بڑھتے اور گھٹتے ہیں، تقریباً دو دہائیوں کی مدار سے لی گئی تصاویر کی نئی تحقیق میں یہ بات سامنے آئی ہے۔ محققین نے ناسا کے مارس ریکونیسنس آربیٹر کے کیمرے سے 2006 سے 2025 تک 36 گڑھوں کا جائزہ لیا اور پایا کہ 32 میں روشن ذخائر تبدیل ہوئے، جبکہ چار میں کوئی تبدیلی نہیں آئی۔ یہ تبدیلیاں تمام گڑھوں میں یکساں نہیں تھیں، جس سے ظاہر ہوتا ہے کہ موسمی برف کے چکر کو سیارے بھر کی تبدیلی نہیں بلکہ مقامی حالات چلاتے ہیں — یہ نتیجہ سائنسدانوں کو مریخ کی طویل مدتی موسمی تاریخ سمجھنے میں مدد دے سکتا ہے۔
  • मंगल के उत्तरी ध्रुवीय बर्फीली टोपी के पास गड्ढों के अंदर बर्फ के भंडार मौसमों के साथ बढ़ते और घटते हैं, लगभग दो दशकों की कक्षीय तस्वीरों के नए अध्ययन में यह बात सामने आई है। शोधकर्ताओं ने नासा के मार्स रिकॉनिसेंस ऑर्बिटर के कैमरे से 2006 से 2025 तक 36 गड्ढों की जांच की और पाया कि 32 में चमकीले भंडार बदले, जबकि चार में कोई बदलाव नहीं आया। ये बदलाव सभी गड्ढों में एक समान नहीं थे, जिससे पता चलता है कि मौसमी बर्फ के चक्र को ग्रह-व्यापी बदलाव नहीं बल्कि स्थानीय परिस्थितियाँ चलाती हैं — यह निष्कर्ष वैज्ञानिकों को मंगल के दीर्घकालिक जलवायु इतिहास को समझने में मदद दे सकता है।

Ice deposits inside craters near Mars' northern polar cap grow and shrink with the seasons, a new study of almost two decades of orbiter images has found. Researchers examined 36 craters using NASA's Mars Reconnaissance Orbiter camera from 2006 to 2025 and found bright deposits changed in 32 of them, while four showed no change. The changes were not uniform across craters, suggesting local conditions, not a planet-wide shift, drive the seasonal frost cycle — a finding that could help scientists read Mars' long-term climate history.

مریخ کے شمالی قطبی برفانی ٹوپی کے قریب گڑھوں کے اندر برف کے ذخائر موسموں کے ساتھ بڑھتے اور گھٹتے ہیں، تقریباً دو دہائیوں کی مدار سے لی گئی تصاویر کی نئی تحقیق میں یہ بات سامنے آئی ہے۔ محققین نے ناسا کے مارس ریکونیسنس آربیٹر کے کیمرے سے 2006 سے 2025 تک 36 گڑھوں کا جائزہ لیا اور پایا کہ 32 میں روشن ذخائر تبدیل ہوئے، جبکہ چار میں کوئی تبدیلی نہیں آئی۔ یہ تبدیلیاں تمام گڑھوں میں یکساں نہیں تھیں، جس سے ظاہر ہوتا ہے کہ موسمی برف کے چکر کو سیارے بھر کی تبدیلی نہیں بلکہ مقامی حالات چلاتے ہیں — یہ نتیجہ سائنسدانوں کو مریخ کی طویل مدتی موسمی تاریخ سمجھنے میں مدد دے سکتا ہے۔

मंगल के उत्तरी ध्रुवीय बर्फीली टोपी के पास गड्ढों के अंदर बर्फ के भंडार मौसमों के साथ बढ़ते और घटते हैं, लगभग दो दशकों की कक्षीय तस्वीरों के नए अध्ययन में यह बात सामने आई है। शोधकर्ताओं ने नासा के मार्स रिकॉनिसेंस ऑर्बिटर के कैमरे से 2006 से 2025 तक 36 गड्ढों की जांच की और पाया कि 32 में चमकीले भंडार बदले, जबकि चार में कोई बदलाव नहीं आया। ये बदलाव सभी गड्ढों में एक समान नहीं थे, जिससे पता चलता है कि मौसमी बर्फ के चक्र को ग्रह-व्यापी बदलाव नहीं बल्कि स्थानीय परिस्थितियाँ चलाती हैं — यह निष्कर्ष वैज्ञानिकों को मंगल के दीर्घकालिक जलवायु इतिहास को समझने में मदद दे सकता है।

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