Uncrewed Aircraft System Measurements of Atmospheric Surface-Layer Structure During Morning Transition

Loiy Al-Ghussain; Sean C.C. Bailey

doi:10.1007/s10546-022-00729-2

Uncrewed Aircraft System Measurements of Atmospheric Surface-Layer Structure During Morning Transition

Loiy Al-Ghussain
, Sean C.C. Bailey

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

This study applies uncrewed aircraft systems towards the investigation of surface-layer structure during the morning transition. Three uncrewed aircraft systems simultaneously measuring horizontal transects were partnered with a fourth measuring vertical profiles during two consecutive mornings as part of the 2017 Collaboration Leading Operational Unmanned Aerial System Development for Meteorology and Atmospheric Physics (CLOUDMAP) measurement campaign near Stillwater, Oklahoma, USA. Data were analyzed to extract time-dependent single-point statistics of kinematic and thermodynamic variables from the uncrewed aircraft systems. In addition, an approach is presented by which multi-point spatial statistics in the form of auto- and cross-correlations could be calculated from the measurements. The results reflect differences in the evolution of spatial statistics with altitude for each of the two days at scales smaller than 500 m, despite very similar synoptic conditions. Conditional averaging was also applied to identify the structure of sweep and ejection motions and results revealed similarities to observations from canonical wall-bounded flow.

Original language	English
Pages (from-to)	229-258
Number of pages	30
Journal	Boundary-Layer Meteorology
Volume	185
Issue number	2
DOIs	https://doi.org/10.1007/s10546-022-00729-2
State	Published - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature B.V.

Funding

This work was supported by the US National Science Foundation through Awards No. CBET-1351411, 1539070, and CNS-1932105.

Funders	Funder number
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	1539070, CBET-1351411, 1932105

Keywords

Coherent structures
Morning transition
Surface layer
Uncrewed aircraft systems

ASJC Scopus subject areas

Atmospheric Science

Access to Document

10.1007/s10546-022-00729-2

Cite this

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title = "Uncrewed Aircraft System Measurements of Atmospheric Surface-Layer Structure During Morning Transition",

abstract = "This study applies uncrewed aircraft systems towards the investigation of surface-layer structure during the morning transition. Three uncrewed aircraft systems simultaneously measuring horizontal transects were partnered with a fourth measuring vertical profiles during two consecutive mornings as part of the 2017 Collaboration Leading Operational Unmanned Aerial System Development for Meteorology and Atmospheric Physics (CLOUDMAP) measurement campaign near Stillwater, Oklahoma, USA. Data were analyzed to extract time-dependent single-point statistics of kinematic and thermodynamic variables from the uncrewed aircraft systems. In addition, an approach is presented by which multi-point spatial statistics in the form of auto- and cross-correlations could be calculated from the measurements. The results reflect differences in the evolution of spatial statistics with altitude for each of the two days at scales smaller than 500 m, despite very similar synoptic conditions. Conditional averaging was also applied to identify the structure of sweep and ejection motions and results revealed similarities to observations from canonical wall-bounded flow.",

keywords = "Coherent structures, Morning transition, Surface layer, Uncrewed aircraft systems",

author = "Loiy Al-Ghussain and Bailey, \{Sean C.C.\}",

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doi = "10.1007/s10546-022-00729-2",

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T1 - Uncrewed Aircraft System Measurements of Atmospheric Surface-Layer Structure During Morning Transition

AU - Al-Ghussain, Loiy

AU - Bailey, Sean C.C.

PY - 2022/11

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N2 - This study applies uncrewed aircraft systems towards the investigation of surface-layer structure during the morning transition. Three uncrewed aircraft systems simultaneously measuring horizontal transects were partnered with a fourth measuring vertical profiles during two consecutive mornings as part of the 2017 Collaboration Leading Operational Unmanned Aerial System Development for Meteorology and Atmospheric Physics (CLOUDMAP) measurement campaign near Stillwater, Oklahoma, USA. Data were analyzed to extract time-dependent single-point statistics of kinematic and thermodynamic variables from the uncrewed aircraft systems. In addition, an approach is presented by which multi-point spatial statistics in the form of auto- and cross-correlations could be calculated from the measurements. The results reflect differences in the evolution of spatial statistics with altitude for each of the two days at scales smaller than 500 m, despite very similar synoptic conditions. Conditional averaging was also applied to identify the structure of sweep and ejection motions and results revealed similarities to observations from canonical wall-bounded flow.

AB - This study applies uncrewed aircraft systems towards the investigation of surface-layer structure during the morning transition. Three uncrewed aircraft systems simultaneously measuring horizontal transects were partnered with a fourth measuring vertical profiles during two consecutive mornings as part of the 2017 Collaboration Leading Operational Unmanned Aerial System Development for Meteorology and Atmospheric Physics (CLOUDMAP) measurement campaign near Stillwater, Oklahoma, USA. Data were analyzed to extract time-dependent single-point statistics of kinematic and thermodynamic variables from the uncrewed aircraft systems. In addition, an approach is presented by which multi-point spatial statistics in the form of auto- and cross-correlations could be calculated from the measurements. The results reflect differences in the evolution of spatial statistics with altitude for each of the two days at scales smaller than 500 m, despite very similar synoptic conditions. Conditional averaging was also applied to identify the structure of sweep and ejection motions and results revealed similarities to observations from canonical wall-bounded flow.

KW - Coherent structures

KW - Morning transition

KW - Surface layer

KW - Uncrewed aircraft systems

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Uncrewed Aircraft System Measurements of Atmospheric Surface-Layer Structure During Morning Transition

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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