Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland
The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycl...
Main Authors: | , , , , , , , , , , , |
---|---|
Format: | Report |
Language: | unknown |
Published: |
2014
|
Subjects: | |
Online Access: | http://210.75.249.4/handle/363003/4180 http://210.75.249.4/handle/363003/16948 http://210.75.249.4/handle/363003/22044 |
id |
ftchinacascnwipb:oai:210.75.249.4:363003/22044 |
---|---|
record_format |
openpolar |
spelling |
ftchinacascnwipb:oai:210.75.249.4:363003/22044 2023-05-15T15:03:43+02:00 Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland Wang, Yonghui Liu, Huiying Chung, Haegeun Yu, Lingfei Mi, Zhaorong Geng, Yan Jing, Xin Wang, Shiping Zeng, Hui Cao, Guangmin Zhao, Xinquan He, Jin-Sheng 2014-10-01 http://210.75.249.4/handle/363003/4180 http://210.75.249.4/handle/363003/16948 http://210.75.249.4/handle/363003/22044 unknown GLOBAL BIOGEOCHEMICAL CYCLES Wang, YH; Liu, HY; Chung, H; Yu, LF; Mi, ZR; Geng, Y; Jing, X; Wang, SP; Zeng, H; Cao, GM; Zhao, XQ; He, JS.Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland,GLOBAL BIOGEOCHEMICAL CYCLES,2014,28(10):1081 http://210.75.249.4/handle/363003/4180 http://210.75.249.4/handle/363003/16948 http://210.75.249.4/handle/363003/22044 6 期刊论文 2014 ftchinacascnwipb 2023-03-26T20:28:00Z The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycle processes such as soil respiration (R-s), but detailed measurements to assess the patterns, drivers of, and potential feedbacks on R-s have not been made yet. We conducted a 4 year study on R-s using a unique R-s measuring system, composed of an automated soil CO2 flux sampling system and a custom-made container, to facilitate measurements in this extreme environment. We found that in the nongrowing season, (1) cumulative R-s was 82-89g C m(-2), accounting for 11.8-13.2% of the annual total R-s; (2) surface soil freezing controlled the diurnal pattern of R-s and bulk soil freezing induced lower reference respiration rate (R-0) and temperature sensitivity (Q(10)) than those in the growing season (0.40-0.53 versus 0.84-1.32 mu mol CO2 m(-2)s(-1) for R-0 and 2.5-2.9 versus 2.9-5.6 for Q(10)); and (3) the intraannual variation in cumulative R-s was controlled by accumulated surface soil temperature. We found that in the summer monsoon-dominated Tibetan alpine grassland, surface soil freezing, bulk soil freezing, and accumulated surface soil temperature are the day-, season-, and year-scale drivers of the non-growing-season R-s, respectively. Our results suggest that warmer winters can trigger carbon loss from this ecosystem because of higher Q(10) of thawed than frozen soils. The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycle processes such as soil respiration (R-s), but detailed measurements to assess the patterns, drivers of, and potential feedbacks on R-s have not been ... Report Arctic Tundra Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) Arctic |
institution |
Open Polar |
collection |
Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascnwipb |
language |
unknown |
description |
The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycle processes such as soil respiration (R-s), but detailed measurements to assess the patterns, drivers of, and potential feedbacks on R-s have not been made yet. We conducted a 4 year study on R-s using a unique R-s measuring system, composed of an automated soil CO2 flux sampling system and a custom-made container, to facilitate measurements in this extreme environment. We found that in the nongrowing season, (1) cumulative R-s was 82-89g C m(-2), accounting for 11.8-13.2% of the annual total R-s; (2) surface soil freezing controlled the diurnal pattern of R-s and bulk soil freezing induced lower reference respiration rate (R-0) and temperature sensitivity (Q(10)) than those in the growing season (0.40-0.53 versus 0.84-1.32 mu mol CO2 m(-2)s(-1) for R-0 and 2.5-2.9 versus 2.9-5.6 for Q(10)); and (3) the intraannual variation in cumulative R-s was controlled by accumulated surface soil temperature. We found that in the summer monsoon-dominated Tibetan alpine grassland, surface soil freezing, bulk soil freezing, and accumulated surface soil temperature are the day-, season-, and year-scale drivers of the non-growing-season R-s, respectively. Our results suggest that warmer winters can trigger carbon loss from this ecosystem because of higher Q(10) of thawed than frozen soils. The Tibetan alpine grasslands, sharing many features with arctic tundra ecosystems, have a unique non-growing-season climate that is usually dry and without persistent snow cover. Pronounced winter warming recently observed in this ecosystem may significantly alter the non-growing-season carbon cycle processes such as soil respiration (R-s), but detailed measurements to assess the patterns, drivers of, and potential feedbacks on R-s have not been ... |
format |
Report |
author |
Wang, Yonghui Liu, Huiying Chung, Haegeun Yu, Lingfei Mi, Zhaorong Geng, Yan Jing, Xin Wang, Shiping Zeng, Hui Cao, Guangmin Zhao, Xinquan He, Jin-Sheng |
spellingShingle |
Wang, Yonghui Liu, Huiying Chung, Haegeun Yu, Lingfei Mi, Zhaorong Geng, Yan Jing, Xin Wang, Shiping Zeng, Hui Cao, Guangmin Zhao, Xinquan He, Jin-Sheng Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
author_facet |
Wang, Yonghui Liu, Huiying Chung, Haegeun Yu, Lingfei Mi, Zhaorong Geng, Yan Jing, Xin Wang, Shiping Zeng, Hui Cao, Guangmin Zhao, Xinquan He, Jin-Sheng |
author_sort |
Wang, Yonghui |
title |
Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
title_short |
Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
title_full |
Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
title_fullStr |
Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
title_full_unstemmed |
Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland |
title_sort |
non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated tibetan alpine grassland |
publishDate |
2014 |
url |
http://210.75.249.4/handle/363003/4180 http://210.75.249.4/handle/363003/16948 http://210.75.249.4/handle/363003/22044 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_relation |
GLOBAL BIOGEOCHEMICAL CYCLES Wang, YH; Liu, HY; Chung, H; Yu, LF; Mi, ZR; Geng, Y; Jing, X; Wang, SP; Zeng, H; Cao, GM; Zhao, XQ; He, JS.Non-growing-season soil respiration is controlled by freezing and thawing processes in the summer monsoon-dominated Tibetan alpine grassland,GLOBAL BIOGEOCHEMICAL CYCLES,2014,28(10):1081 http://210.75.249.4/handle/363003/4180 http://210.75.249.4/handle/363003/16948 http://210.75.249.4/handle/363003/22044 |
op_rights |
6 |
_version_ |
1766335581233610752 |