KOPRI Repository

Snow depth manipulation experiments in dry and moist tundra

Metadata Downloads
Title
Snow depth manipulation experiments in dry and moist tundra
Other Titles
건조, 습윤 툰드라에서의 강설 모사 실험
Authors
권민정
Ioan Wagner
Nam, Sungjin
Lee, Yoo Kyung
Kim, Mincheol
Jung, Ji Young
Claudia I. Czimczik
Keywords
북극 동토층
Issue Date
2017
Citation
권민정, et al. 2017. Snow depth manipulation experiments in dry and moist tundra. AGU Fall meeting 2017. 미국 뉴올리언즈. 2017.12.11~2017.12.15.
Abstract
As a result of global warming, precipitation in the Arctic is expected to increase by 25-50% by the end of this century, mostly in the form of snow. However, precipitation patterns vary considerable in space and time, and future precipitation patterns are highly uncertain at local and regional scales. The amount of snowfall (or snow depth) influences a number of ecosystem properties in Arctic ecosystems, such as soil temperature over winter and soil moisture in the following growing season. These modifications then affect rates of carbon-related soil processes and photosynthesis, thus CO2 exchange rates between terrestrial ecosystems and the atmosphere. In this study, we investigate the effects of snow depth on the magnitude, sources and temporal dynamics of CO2 fluxes. We installed snow fences in a dry dwarf-shrub (Cambridge Bay, Canada; 69° N, 105° W) and a moist low-shrub (Council, Alaska, USA; 64° N, 165° W) tundra in summer 2017, and established control, and increased and reduced snow depth plots at each snow fence. Summertime CO2 flux rates (net ecosystem exchange, ecosystem respiration, gross primary production) and the fractions of autotrophic and heterotrophic respiration to ecosystem respiration were measured using manual chambers and radiocarbon signatures. Wintertime CO2 flux rates will be measured using soda lime adsorption technique and forced diffusion chambers. Soil temperature and moisture at multiple depths, as well as changes in soil properties and microbial communities will be also observed, to research whether these changes affect CO2 flux rates or patterns. Our study will elucidate how future snow depth and its impact on soil physical and biogeochemical properties influence the magnitude and sources of tundra-atmosphere CO2 exchange in the rapidly warming Arctic.
URI
http://repository.kopri.re.kr/handle/201206/8278
Conference Name
AGU Fall meeting 2017
Conference Place
미국 뉴올리언즈
Conference Date
2017.12.11~2017.12.15
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse