Title: Arctic Feedbacks on Trace Gas Compositions.

Speaker: Francia Tenorio, NOAA EPP/MSI CESSRST-II Fellow at SDSU

Date: August 22, 20223

Time: 1:30 PM ET

Venue: Virtual

Meeting Link : meet.google.com/ead-ypxo-gvb

Phone Number
(‪US‬)‪+1 219-321-0478‬
PIN: ‪651 945 406#‬

Learn more about the speaker

Abstract:

Polar ecosystems are warming faster than any other region on Earth (IPCC 2022), posing many implications for tundra landscapes. The accelerated warming in the Arctic influences the rate and movement of nutrients in the soil and water, plant growth, microbial decomposition, and thawing of the permafrost processes that occur across the landscape. This can release greenhouse gases (GHG) into the atmosphere. Since permafrost regions hold over half of all the estimated organic carbon stored in Earth’s soils and 40-60 Pg of nitrogen, it is essential to understand changes across the Arctic landscape and how this influences climate dynamics locally and globally. Thermokarst formations, which typically occur during the thawing of the permafrost, may be sources of emissions in tundra landscapes and a reflection of rapid climate change. Microtopographic features, particularly bare soils, may be a hotspot for GHGs. The webinar will present a mapping effort of such features via remote sensing techniques in a tundra ecosystem near Utqiaġvik, Alaska, emphasizing the monitoring GHGs from such features.