Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases

Hui Zhang, Angela V. Gallego-Sala, Matthew J. Amesbury, Dan J. Charman, Sanna Riikka Piilo, Minna Maria Väliranta

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

Northern peatlands have accumulated large carbon (C) stocks since the last deglaciation and during past millennia they have acted as important atmospheric C sinks. However, it is still poorly understood how northern peatlands in general and Arctic permafrost peatlands in particular will respond to future climate change. In this study, we present C accumulation reconstructions derived from 14 peat cores from four permafrost peatlands in northeast European Russia and Finnish Lapland. The main focus is on warm climate phases. We used regression analyses to test the importance of different environmental variables such as summer temperature, hydrology, and vegetation as drivers for nonautogenic C accumulation. We used modeling approaches to simulate potential decomposition patterns. The data show that our study sites have been persistent mid- to late-Holocene C sinks with an average accumulation rate of 10.80-32.40g C m(-2) year(-1). The warmer climate phase during the Holocene Thermal Maximum stimulated faster apparent C accumulation rates while the Medieval Climate Anomaly did not. Moreover, during the Little Ice Age, apparent C accumulation rates were controlled more by other factors than by cold climate per se. Although we could not identify any significant environmental factor that drove C accumulation, our data show that recent warming has increased C accumulation in some permafrost peatland sites. However, the synchronous slight decrease of C accumulation in other sites may be an alternative response of these peatlands to warming in the future. This would lead to a decrease in the C sequestration ability of permafrost peatlands overall.

Alkuperäiskielienglanti
LehtiGlobal Biogeochemical Cycles
Vuosikerta32
Numero10
Sivut1605-1620
Sivumäärä16
ISSN0886-6236
DOI - pysyväislinkit
TilaJulkaistu - lokakuuta 2018
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

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Zhang, Hui ; Gallego-Sala, Angela V. ; Amesbury, Matthew J. ; Charman, Dan J. ; Piilo, Sanna Riikka ; Väliranta, Minna Maria. / Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases. Julkaisussa: Global Biogeochemical Cycles. 2018 ; Vuosikerta 32, Nro 10. Sivut 1605-1620.
@article{ae987f130cb941728e1c32c6b2612d4f,
title = "Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases",
abstract = "Northern peatlands have accumulated large carbon (C) stocks since the last deglaciation and during past millennia they have acted as important atmospheric C sinks. However, it is still poorly understood how northern peatlands in general and Arctic permafrost peatlands in particular will respond to future climate change. In this study, we present C accumulation reconstructions derived from 14 peat cores from four permafrost peatlands in northeast European Russia and Finnish Lapland. The main focus is on warm climate phases. We used regression analyses to test the importance of different environmental variables such as summer temperature, hydrology, and vegetation as drivers for nonautogenic C accumulation. We used modeling approaches to simulate potential decomposition patterns. The data show that our study sites have been persistent mid- to late-Holocene C sinks with an average accumulation rate of 10.80-32.40g C m(-2) year(-1). The warmer climate phase during the Holocene Thermal Maximum stimulated faster apparent C accumulation rates while the Medieval Climate Anomaly did not. Moreover, during the Little Ice Age, apparent C accumulation rates were controlled more by other factors than by cold climate per se. Although we could not identify any significant environmental factor that drove C accumulation, our data show that recent warming has increased C accumulation in some permafrost peatland sites. However, the synchronous slight decrease of C accumulation in other sites may be an alternative response of these peatlands to warming in the future. This would lead to a decrease in the C sequestration ability of permafrost peatlands overall.",
keywords = "1172 Environmental sciences, SOUTH-CENTRAL ALASKA, NET PRIMARY PRODUCTION, HOLOCENE CLIMATE, PLANT MACROFOSSILS, VEGETATION CHANGE, BOREAL PEATLANDS, FINNISH LAPLAND, LAST MILLENNIUM, TESTATE AMEBA, DYNAMICS",
author = "Hui Zhang and Gallego-Sala, {Angela V.} and Amesbury, {Matthew J.} and Charman, {Dan J.} and Piilo, {Sanna Riikka} and V{\"a}liranta, {Minna Maria}",
year = "2018",
month = "10",
doi = "10.1029/2018GB005980",
language = "English",
volume = "32",
pages = "1605--1620",
journal = "Global Biogeochemical Cycles",
issn = "0886-6236",
publisher = "Wiley/Blackwell",
number = "10",

}

Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases. / Zhang, Hui; Gallego-Sala, Angela V.; Amesbury, Matthew J.; Charman, Dan J.; Piilo, Sanna Riikka; Väliranta, Minna Maria.

julkaisussa: Global Biogeochemical Cycles, Vuosikerta 32, Nro 10, 10.2018, s. 1605-1620.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Inconsistent Response of Arctic Permafrost Peatland Carbon Accumulation to Warm Climate Phases

AU - Zhang, Hui

AU - Gallego-Sala, Angela V.

AU - Amesbury, Matthew J.

AU - Charman, Dan J.

AU - Piilo, Sanna Riikka

AU - Väliranta, Minna Maria

PY - 2018/10

Y1 - 2018/10

N2 - Northern peatlands have accumulated large carbon (C) stocks since the last deglaciation and during past millennia they have acted as important atmospheric C sinks. However, it is still poorly understood how northern peatlands in general and Arctic permafrost peatlands in particular will respond to future climate change. In this study, we present C accumulation reconstructions derived from 14 peat cores from four permafrost peatlands in northeast European Russia and Finnish Lapland. The main focus is on warm climate phases. We used regression analyses to test the importance of different environmental variables such as summer temperature, hydrology, and vegetation as drivers for nonautogenic C accumulation. We used modeling approaches to simulate potential decomposition patterns. The data show that our study sites have been persistent mid- to late-Holocene C sinks with an average accumulation rate of 10.80-32.40g C m(-2) year(-1). The warmer climate phase during the Holocene Thermal Maximum stimulated faster apparent C accumulation rates while the Medieval Climate Anomaly did not. Moreover, during the Little Ice Age, apparent C accumulation rates were controlled more by other factors than by cold climate per se. Although we could not identify any significant environmental factor that drove C accumulation, our data show that recent warming has increased C accumulation in some permafrost peatland sites. However, the synchronous slight decrease of C accumulation in other sites may be an alternative response of these peatlands to warming in the future. This would lead to a decrease in the C sequestration ability of permafrost peatlands overall.

AB - Northern peatlands have accumulated large carbon (C) stocks since the last deglaciation and during past millennia they have acted as important atmospheric C sinks. However, it is still poorly understood how northern peatlands in general and Arctic permafrost peatlands in particular will respond to future climate change. In this study, we present C accumulation reconstructions derived from 14 peat cores from four permafrost peatlands in northeast European Russia and Finnish Lapland. The main focus is on warm climate phases. We used regression analyses to test the importance of different environmental variables such as summer temperature, hydrology, and vegetation as drivers for nonautogenic C accumulation. We used modeling approaches to simulate potential decomposition patterns. The data show that our study sites have been persistent mid- to late-Holocene C sinks with an average accumulation rate of 10.80-32.40g C m(-2) year(-1). The warmer climate phase during the Holocene Thermal Maximum stimulated faster apparent C accumulation rates while the Medieval Climate Anomaly did not. Moreover, during the Little Ice Age, apparent C accumulation rates were controlled more by other factors than by cold climate per se. Although we could not identify any significant environmental factor that drove C accumulation, our data show that recent warming has increased C accumulation in some permafrost peatland sites. However, the synchronous slight decrease of C accumulation in other sites may be an alternative response of these peatlands to warming in the future. This would lead to a decrease in the C sequestration ability of permafrost peatlands overall.

KW - 1172 Environmental sciences

KW - SOUTH-CENTRAL ALASKA

KW - NET PRIMARY PRODUCTION

KW - HOLOCENE CLIMATE

KW - PLANT MACROFOSSILS

KW - VEGETATION CHANGE

KW - BOREAL PEATLANDS

KW - FINNISH LAPLAND

KW - LAST MILLENNIUM

KW - TESTATE AMEBA

KW - DYNAMICS

U2 - 10.1029/2018GB005980

DO - 10.1029/2018GB005980

M3 - Article

VL - 32

SP - 1605

EP - 1620

JO - Global Biogeochemical Cycles

JF - Global Biogeochemical Cycles

SN - 0886-6236

IS - 10

ER -