Published November 22, 2021 | Version v1
Publication Open

Cambio de área glaciar en el volcán Maipo (Andes Centrales), una aproximación morfométrica: 4 décadas de registros satelitales

Creators

  • 1. Consejo Nacional de Investigaciones Científicas y Técnicas
  • 2. National University of Cuyo
  • 3. Instituto de Química del Noroeste Argentino
  • 4. University of Chile

Description

Current climatic conditions in Central Andes (CA) (31-36 °S) have triggered the reduction of glacier area. Although CA are geographically circumscribed to an area under the same macroclimatic domain, their rugged topography creates several topoclimates as response to the effects of elevation, slope and aspect (morphometric factors). This study explores the impact of morphometric factors on the evolution of the glacial surface located above of Maipo volcano (34°09'50''S; 69°49'53''W). Through the use of 11 LANDSAT images (MSS, TM and OLI), the spatio-temporal evolution (period 1976-2020) of the glacier area was reconstructed. On this period, glacier area was reduced by 6 ± 0.5 km2 (-0.14 ± 0.01 km2a-1), equal to 63 % of 1976 glacial area (9.6 ± 0.5 km2). Fifty percent of the reduction occurred between 3,900 and 4,000 m elevation, with absolute losses towards lower elevations. In addition, it was detected that for every 100 m of ascent the relative area loss rate decreased 0.1 %a-1 (R2 = 0.81; p-value

⚠️ This is an automatic machine translation with an accuracy of 90-95%

Translated Description (Arabic)

أدت الظروف المناخية الحالية في جبال الأنديز الوسطى (31-36 درجة مئوية) إلى انخفاض مساحة الأنهار الجليدية. على الرغم من أن CA محصورة جغرافيًا في منطقة تقع تحت نفس مجال المناخ الكلي، إلا أن تضاريسها الوعرة تخلق العديد من المناخات الطوبوغرافية كاستجابة لتأثيرات الارتفاع والمنحدر والجانب (العوامل المورفومترية). تستكشف هذه الدراسة تأثير العوامل المورفومترية على تطور السطح الجليدي الواقع فوق بركان مايبو (34°09'50' S; 69°49 '53'W). من خلال استخدام 11 صورة لاندسات (MSS و TM و OLI)، تمت إعادة بناء التطور المكاني والزماني (الفترة 1976-2020) لمنطقة الأنهار الجليدية. في هذه الفترة، انخفضت مساحة الأنهار الجليدية بمقدار 6 ± 0.5 كم 2 (-0.14 ± 0.01 كم 2 أ-1)، أي ما يعادل 63 ٪ من المساحة الجليدية لعام 1976 (9.6 ± 0.5 كم 2). حدث خمسون في المائة من الانخفاض بين ارتفاع 3900 و 4000 متر، مع خسائر مطلقة نحو الارتفاعات المنخفضة. بالإضافة إلى ذلك، تم اكتشاف أنه لكل 100 متر من الصعود، انخفض معدل فقدان المنطقة النسبي بنسبة 0.1 ٪ أ -1 (R2 = 0.81 ؛ قيمة p

Translated Description (English)

Current climatic conditions in the Central Andes (CA) (31-36 °S) have triggered the reduction of glacier area. Although CA are geographically circumscribed to an area under the same macroclimatic domain, their rugged topography creates several topoclimates as a response to the effects of elevation, slope and aspect (morphometric factors). This study explores the impact of morphometric factors on the evolution of the glacial surface located above Maipo volcano (34°09'50''S; 69°49'53''W). Through the use of 11 LANDSAT images (MSS, TM and OLI), the spatio-temporal evolution (period 1976-2020) of the glacier area was reconstructed. On this period, glacier area was reduced by 6 ± 0.5 km2 (-0.14 ± 0.01 km2a-1), equal to 63% of 1976 glacial area (9.6 ± 0.5 km2). Fifty percent of the reduction occurred between 3,900 and 4,000 m elevation, with absolute losses towards lower elevations. In addition, it was detected that for every 100 m of ascent the relative area loss rate decreased 0.1% a -1 (R2 = 0.81; p-value

Translated Description (French)

Current climatic conditions in Central Andes (CA) (31-36 °S) have triggered the reduction of glacier area. Although CA are geographically circumscribed to an area under the same macroclimatic domain, their rugged topography creates several topoclimates as response to the effects of elevation, slope and aspect (morphometric factors). This study explores the impact of morphometric factors on the evolution of the glacial surface located above of Maipo volcano (34°09'50''S ; 69°49'53''W). Grâce à l'utilisation de 11 LANDSAT images (MSS, TM et HUILES), l'évolution spatio-temporelle (période 1976-2020) de la zone glaciaire a été reconstruite. On this period, glacier area was reduced by 6 ± 0.5 km2 (-0.14 ± 0.01 km2a-1), equal to 63 % of 1976 glacial area (9.6 ± 0.5 km2). Fifty percent of the reduction occurred between 3,900 and 4,000 m elevation, with absolute losses towards lower elevations. En outre, il est détecté pour chaque 100 m d'ascent la zone de taux de perte décrétée correspondante 0,1 % à -1 (R2 = 0,81 ; p-value

Files

pdf.pdf

Files (3.6 MB)

⚠️ Please wait a few minutes before your translated files are ready ⚠️ Note: Some files might be protected thus translations might not work.
Name Size Download all
md5:b8439c8b02e39641630cd70167d7d18f
3.6 MB
Preview Download

Additional details

Additional titles

Translated title (Arabic)
تغير المنطقة الجليدية في بركان مايبو (جبال الأنديز الوسطى)، تقريب مورفومتري: 4 عقود من سجلات الأقمار الصناعية
Translated title (English)
Glacial area change in the Maipo volcano (Central Andes), a morphometric approximation: 4 decades of satellite records
Translated title (French)
Changement de zone glaciaire sur le volcan Maipo (Andes centrales), une approche morphométrique : 4 décennies d'enregistrements satellitaires

Identifiers

Other
https://openalex.org/W3217372209
DOI
10.5027/andgeov49n1-3369

Is supplement to
https://openalex.org/W4353035475 (Other)
https://openalex.org/W4292086290 (Other)
https://openalex.org/W3215599352 (Other)
https://openalex.org/W3185691870 (Other)
https://openalex.org/W3085238735 (Other)
https://openalex.org/W2986018081 (Other)
https://openalex.org/W2388674160 (Other)
https://openalex.org/W2375685322 (Other)
https://openalex.org/W1996766450 (Other)
https://openalex.org/W175410808 (Other)

GreSIS Basics Section

Is Global South Knowledge
Yes
Country
Argentina