Arid
DOI10.1002/2013GB004568
Introducing a terrestrial carbon pool in warm desert bedrock mountains, southwestern USA
Harrison, Emma J.; Dorn, Ronald I.
通讯作者Harrison, Emma J.
来源期刊GLOBAL BIOGEOCHEMICAL CYCLES
ISSN0886-6236
EISSN1944-9224
出版年2014
卷号28期号:3页码:253-268
英文摘要

Growth of the Phoenix metropolitan area led to road cut or house platform exposures of the internal bedrock material of surrounding semiarid mountain ranges. Similar exposures in the surrounding Sonoran and Mojave Deserts reveal the presence of sedimentary calcium carbonate infilling the preexisting fracture matrix of the bedrock. Field surveys at 31 sites with bedrock fractures filled with carbonate, referred to as BFFC in the following text, reveal an average of 0.0790.036 mTC/m(2) stored in the upper 2m of analyzed bedrock exposures. Backscattered electron microscopy images indicate the presence of carbonate at the micron scale, not included in this estimate of carbon storage. Pilot radiocarbon and Sr isotope analyses suggest that one of the surveyed BFFC veins was flushed into the bedrock from a nonbedrock source during the wetter last glacial period in the late Pleistocene.


Key Points


Desert bedrock fractures contain substantial amounts of carbonate The upper 2 m of analyzed exposures host about 0.079 mTC per square meter Pilot data suggest an asymmetric rhythm of storage and release of this carbon


英文关键词carbon cycle carbon reservoir carbonate desert weathering geomorphology
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000334265000006
WOS关键词SOIL-EROSION RATES ; YUCCA MOUNTAIN ; SOUTHEASTERN AUSTRALIA ; PEDOGENIC CARBONATE ; SECONDARY CALCITE ; ATMOSPHERIC CO2 ; MOJAVE-DESERT ; SR ISOTOPE ; WEATHERING FLUXES ; UNSATURATED ZONE
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
来源机构Arizona State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/182334
作者单位Arizona State Univ, Sch Geog Sci & Urban Planning, Tempe, AZ 85287 USA
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GB/T 7714
Harrison, Emma J.,Dorn, Ronald I.. Introducing a terrestrial carbon pool in warm desert bedrock mountains, southwestern USA[J]. Arizona State University,2014,28(3):253-268.
APA Harrison, Emma J.,&Dorn, Ronald I..(2014).Introducing a terrestrial carbon pool in warm desert bedrock mountains, southwestern USA.GLOBAL BIOGEOCHEMICAL CYCLES,28(3),253-268.
MLA Harrison, Emma J.,et al."Introducing a terrestrial carbon pool in warm desert bedrock mountains, southwestern USA".GLOBAL BIOGEOCHEMICAL CYCLES 28.3(2014):253-268.
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