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Investigation of the atmospheric surface layer using a novel high-resolution sensor array

Huang, K. Y. and Brunner, C. E. and Fu, M. K. and Kokmanian, K. and Morrison, T. J. and Perelet, A. O. and Calaf, M. and Pardyjak, E. and Hultmark, M. (2021) Investigation of the atmospheric surface layer using a novel high-resolution sensor array. Experiments in Fluids, 62 (4). Art. No. 76. ISSN 0723-4864. doi:10.1007/s00348-021-03173-z.

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Representing land-atmosphere exchange processes as lower boundary conditions remains a challenge in numerical weather predictions. One important reason is the lack of understanding of heterogeneities in topography, land cover, stability, and their effects on all aspects of the flow field and scalar transport. Well-resolved flow measurements can shed light on these near-surface processes, yielding improved modeling approaches. Yet, it is precisely the heterogeneous characteristics in question—along with the large separation of scales—that make field measurements notoriously challenging. To address some of the difficulties encountered in probing the atmospheric surface layer, a unique and economically scalable field measurement platform was designed around the nanoscale thermal anemometry probe technology, which has previously been used successfully at high Reynolds numbers in laboratory settings. The small size of the nanoscale sensors not only provides a high spatial resolution but also allows for velocity and temperature measurements with the same constant current operating circuit. This operating mode is more economical and straightforward to construct than conventional constant temperature anemometry systems, providing a scalable platform for multi-point measurements. The measurement platform was deployed at the Surface Layer Turbulence and Environmental Science Test site in Utah’s West Desert as part of the Idealised horizontal Planar Array study for Quantifying Surface heterogeneity. Streamwise velocity and temperature data were acquired within the first meter above ground with good agreement in spectral behavior to well-known scaling laws in wall-bounded flows.

Item Type:Article
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URLURL TypeDescription shareable link
Huang, K. Y.0000-0003-0179-3615
Fu, M. K.0000-0003-3949-7838
Kokmanian, K.0000-0003-2792-3190
Additional Information:© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021. Received: 17 November 2020; Revised: 26 January 2021; Accepted: 23 February 2021. This work was supported by the NSF AGS-1649049 (Program manager: Dr. JS). KYH and CEB were supported by the Department of Defense (DoD) through the National Defense Science and Engineering Graduate Fellowship (NDSEG) Program. The authors would like to thank Prof. Clayton Byers and Agastya Parikh for their assistance with the CCA circuit design, Alexander Piqué for providing support in the field, and Princeton University’s clean room staff for their assistance in manufacturing the sensors.
Funding AgencyGrant Number
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20210323-135727606
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Official Citation:Huang, K.Y., Brunner, C.E., Fu, M.K. et al. Investigation of the atmospheric surface layer using a novel high-resolution sensor array. Exp Fluids 62, 76 (2021).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108532
Deposited By: Tony Diaz
Deposited On:24 Mar 2021 19:44
Last Modified:24 Mar 2021 19:44

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