Space - scale resolved surface fluxes across a heterogeneous, mid-latitude forested landscape

Paleri, Sreenath; Desai, Ankur R.; Metzger, Stefan; Durden, David; Butterworth, Brian; Mauder, Matthias; Kohnert, Katrin; Serafimovich, Andrei

doi:10.1002/essoar.10511424.2

2022

DOI: 10.1002/essoar.10511424.2

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Space - scale resolved surface fluxes across a heterogeneous, mid-latitude forested landscape

Sreenath Paleri

Ankur R. Desai

Stefan Metzger

et al.

Abstract: Surface-atmospheric fluxes of energy, momentum, water, carbon, and other scalars are integral components of Earth system processes. Terrestrial ecosystems act as important intermediaries for these exchange processes, influencing Earth's weather and climate systems (Pielke et al., 1998). However, the land-surface is heterogeneous

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The global distribution of paired eddy covariance towers

Stoy

Chu

Dahl

et al. 2023

Preprint

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The eddy covariance technique has revolutionized our understanding of ecosystem-atmosphere interactions. Eddy covariance studies often use a “paired” tower design in which observations from nearby towers are used to understand how different vegetation, soils, hydrology, or experimental treatment shape ecosystem function and surface-atmosphere exchange. Paired towers have never been formally defined and their global distribution has not been quantified. We compiled eddy covariance tower information to find towers that could be considered paired. Of 1233 global eddy covariance towers, 692 (56%) were identified as paired by our criteria. Paired towers had cooler mean annual temperature (mean = 9.9 °C) than the entire eddy covariance network (10.5 °C) but warmer than the terrestrial surface (8.9 °C) from WorldClim 2.1, on average. The paired and entire tower networks had greater average soil nitrogen (0.57-0.58 g/kg) and more silt (36.0-36.4%) than terrestrial ecosystems (0.38 g/kg and 30.5%), suggesting that eddy covariance towers sample richer soils than the terrestrial surface as a whole. Paired towers existed in a climatic space that was more different from the global climate distribution sampled by the entire eddy covariance network, as revealed by an analysis of the Kullback-Leibler divergence, but the edaphic space sampled by the entire network and paired towers was similar. The lack of paired towers with available data across much of Africa, northern, central, southern, and western Asia, and Latin America with few towers in savannas, shrublands, and evergreen broadleaf forests point to key regions, ecosystems, and ecosystem transitions in need of additional research. Few if any paired towers study the flux of ozone and other atmospherically active trace gases at the present. By studying what paired towers measure – and what they do not – we can make infrastructural investments to further enhance the value of FLUXNET as it moves toward its fourth decade.

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The global distribution of paired eddy covariance towers

Stoy

Chu

Dahl

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

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Space - scale resolved surface fluxes across a heterogeneous, mid-latitude forested landscape

Cited by 1 publication

References 45 publications

The global distribution of paired eddy covariance towers

The global distribution of paired eddy covariance towers

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