Representing the Heat-to-Moisture Transport Efficiency in Stable Conditions: An Extension of Two Different Approaches

다국어 초록 (Multilingual Abstract)

Using eddy-covariance turbulence measurements over a Tibetan glacier, we present a description of scalar turbulence characteristics in the stable boundary layer. Interesting behaviours are demonstrated in terms of temperature–humidity de-correlation and dissimilarity. That is, a lack of perfect correlation occurs between the two scalars (i.e., correlation coefficients <1 in magnitude); overall, sensible heat is more efficiently transported than water vapour over snow and ice surfaces. Such behaviours provide evidence of departures from the idealized expectation of Monin–Obukhov similarity theory—all scalars assume a perfect level of linear correlation and an equal efficiency level of vertical transport. Results presented herein are noteworthy in that observations over uniform glaciated surfaces involve negligible effects of either a canopy-induced roughness sublayer or heterogeneity in the temperature–humidity source/sink distributions. Moreover, we address two different approaches to representing the heat-to-moisture transport efficiency in stable conditions. A new approach is extended through application of the quadrant analysis technique, thereby representing it as a function of atmospheric stability. Caution is further advised in the use of this approach, when temperature–humidity turbulence becomes markedly de-correlated. A second approach, as previously applied for estimating forest evaporation fluxes in unstable conditions, is extended to a stable boundary layer over snow and ice surfaces.

참고문헌 (Reference)

1 Gao, Z. Q., "Turbulent variance characteristics of temperature and humidity over a nonuniform land surface for an agricultural ecosystem in China" 23 : 365-374, 2006

2 Wang, L., "Turbulent transport of momentum and scalars above an urban canopy" 150 : 485-511, 2014

3 Asanuma, J., "Turbulence variance characteristics of temperature and humidity in the unstable atmospheric surface layer above a variable pine forest" 35 : 515-521, 1999

4 Katul, G. G., "The temperature–humidity covariance in the marine surface layer: a one-dimensional analytical model" 126 : 263-278, 2008

5 Parish, T. R., "The role of katabatic winds on the Antarctic surface wind regime" 131 : 317-333, 2003

6 Moene, A. F., "The effect of surface heterogeneity on the temperature–humidity correlation and the relative transport efficiency" 129 : 99-113, 2008

7 Lamaud, E., "Temperature–humidity dissimilarity and heat-towater- vapour transport efficiency above and within a pine forest canopy: the role of the Bowen ratio" 120 : 87-109, 2006

8 van den Broeke, M., "Surface layer climate and turbulent exchange in the ablation zone of the West Greenland ice sheet" 29 : 2309-2323, 2009

9 Giesen, R. H., "Surface energy balance in the ablation zone of Midtdalsbreen, a glacier in southern Norway: interannual variability and the effect of clouds" 113 : 2008

10 Detto, M., "Simplified expressions for adjusting higher-order turbulent statistics obtained from open path gas analyzers" 122 : 205-216, 2007

11 Dias, N. L., "Similarity of scalars under stable conditions" 80 : 355-373, 1996

12 Katul, G., "Reply to the comment by Bink and Meesters" 84 : 503-509, 1997

13 Roth, M., "Relative efficiencies of turbulent transfer of heat, mass, and momentum over a patchy urban surface" 52 : 1863-1874, 1995

14 Munro, D.S., "Peyto glacier: one century of science" National Hydrology Research Institute 135-178, 2006

15 Assouline, S., "On the variability of the Priestley- Taylor coefficient over water bodies" 52 : 150-163, 2016

16 Larsén, X. G., "On the temperature and humidity dissimilarity in the marine surface layer" 151 : 273-291, 2014

17 Cava, D., "On the anomalous behaviour of scalar flux-variance similarity functions within the canopy sub-layer of a dense alpine forest" 128 : 33-57, 2008

18 Mahrt, L., "Nocturnal boundary layer regimes" 88 : 255-278, 1998

19 van den Broeke, M. R., "Momentum, heat, and moisture budgets of the katabatic wind layer over a midlatitude glacier in summer" 36 : 763-774, 1997

20 Foken, T., "Micrometeorology" Springer 2017

21 Van Kesteren, B, "Measuring H2O and CO2 fluxes at field scales with scintillometry: part I – introduction and validation of four methods" 178–179 : 75-87, 2013

22 Moriwaki, R., "Local and global similarity in turbulent transfer of heat, water vapour, and CO2 in the dynamic convective sublayer over a suburban area" 120 : 163-179, 2006

23 Katul, G., "Latent and sensible heat flux predictions from a uniform pine forest using surface renewal and flux variance methods" 80 : 249-282, 1996

24 Li, D., "Intrinsic constraints on asymmetric turbulent transport of scalars within the constant flux layer of the lower atmosphere" 45 : 2022-2030, 2018

25 Konya, K., "Influence of weather conditions and spatial variability on glacier surface melt in Chilean Patagonia" 102 : 139-149, 2010

26 Hill, R. J., "Implications of Monin-Obukhov similarity theory for scalar quantities" 46 : 2236-2244, 1989

27 Oerlemans, J., "Glacio-meteorological investigations on Vatnajökull, Iceland, summer 1996 : an overview" 92 : 3-26, 1999

28 Oerlemans, J., "Glacier winds and parameterisation of the related surface heat fluxes" 54 : 440-452, 2002

29 Guo, X., "Fluxvariance method for latent heat and carbon dioxide fluxes in unstable conditions" 131 : 363-384, 2009

30 Kohsiek, W., "Estimation of the sensible heat flux of a semi-arid area using surface radiative temperature measurements" 63 : 213-230, 1993

31 Katul, G., "Estimation of surface heat and momentum fluxes using the fluxvariance method above uniform and non-uniform terrain" 74 : 237-260, 1995

32 Gao, Z., "Enhanced temperature–humidity similarity caused by entrainment processes with increased wind shear" 123 : 4110-4121, 2018

33 Oerlemans, J., "Energy balance of a glacier surface: analysis of automatic weather station data from the Morteratschgletscher. Switzerland" 34 : 477-485, 2002

34 Ding, B., "Development of a Water and Enthalpy Budgetbased Glacier mass balance Model (WEB-GM) and its preliminary validation" 53 : 3146-3178, 2017

35 Xu, B.-Q, "Deposition of anthropogenic aerosols in a southeastern Tibetan glacier" 114 (114): 2009

36 Guo, X., "Critical evaluation of scalar roughness length parametrizations over a melting valley glacier" 139 : 307-332, 2011

37 Giesen, R. H., "Comparison of the meteorology and surface energy balance at Storbreen and Midtdalsbreen, two glaciers in southern Norway" 3 : 57-74, 2009

38 Bink, N. J., "Comment on ‘Estimation of surface heat and momentum fluxes using the flux-variance method above uniform and non-uniform terrain’ by Katul et al. (1995)" 84 : 497-502, 1997

39 Li, D., "Coherent structures and the dissimilarity of turbulent transport of momentum and scalars in the unstable atmospheric surface layer" 140 : 243-262, 2011

40 Oerlemans, J., "Clear and Cloudy Boundary Layers" Royal Netherlands Academy of Arts and Sciences 129-153, 1998

41 Guo, X., "Characterizing urban turbulence under haze pollution: insights into temperature–humidity dissimilarity" 158 : 501-510, 2016

42 Anderson, P. S., "Boundary layer physics over snow and ice" 8 : 3563-3582, 2008

43 Padro, J., "An investigation of flux-variance methods and universal functions applied to three land-use types in unstable conditions" 66 : 413-425, 1993

44 Katul, G. G., "A note on the flux-variance similarity relationships for heat and water vapour in the unstable atmospheric surface layer" 90 : 327-338, 1999

45 Denby, B., "A comparison of surface renewal theory with the observed roughness length for temperature on a melting glacier surface" 103 : 459-468, 2002