Climate studies via space geodesy: Relationships between ENSO and interannual length-of-day variation

1993 ◽  
pp. 141-155 ◽  
Author(s):  
J. O. Dickey ◽  
S. L. Marcus ◽  
T. M. Eubanks ◽  
R. Hide
Keyword(s):  
Space Geodesy ◽  
Length Of Day ◽  
Climate Studies

scholarly journals A New TanSat XCO2 Global Product towards Climate Studies

2020 ◽  
Vol 38 (1) ◽  
pp. 8-11
Author(s):  
Dongxu Yang ◽  
Yi Liu ◽  
Hartmut Boesch ◽  
Lu Yao ◽  
Antonio Di Noia ◽  
...  
Keyword(s):  
Climate Studies

scholarly journals The angular velocities of the plates and the velocity of Earth's centre from space geodesy

2010 ◽  
Vol 180 (3) ◽  
pp. 913-960 ◽  
Author(s):  
Donald F. Argus ◽  
Richard G. Gordon ◽  
Michael B. Heflin ◽  
Chopo Ma ◽  
Richard J. Eanes ◽  
...  
Keyword(s):  
Space Geodesy ◽  
Angular Velocities

scholarly journals Effect of global warming on the length-of-day

2002 ◽  
Vol 29 (7) ◽  
Author(s):  
Olivier de Viron ◽  
Véronique Dehant ◽  
Hugues Goosse ◽  
Michel Crucifix ◽  
Keyword(s):  
Global Warming ◽  
Length Of Day

scholarly journals Diurnal variations in the UV albedo of arctic snow

2008 ◽  
Vol 8 (21) ◽  
pp. 6551-6563 ◽  
Author(s):  
O. Meinander ◽  
A. Kontu ◽  
K. Lakkala ◽  
A. Heikkilä ◽  
L. Ylianttila ◽  
...  
Keyword(s):  
High Surface ◽  
Measured Temperature ◽  
Snow Melt ◽  
Clear Sky ◽  
Different Types ◽  
Essential Parameter ◽  
Surface Reflectivity ◽  
Climate Studies ◽  
Radiative Transfer Modeling ◽  
Surface Layer Thickness

Abstract. The relevance of snow for climate studies is based on its physical properties, such as high surface reflectivity. Surface ultraviolet (UV) albedo is an essential parameter for various applications based on radiative transfer modeling. Here, new continuous measurements of the local UV albedo of natural Arctic snow were made at Sodankylä (67°22'N, 26°39'E, 179 m a.s.l.) during the spring of 2007. The data were logged at 1-min intervals. The accumulation of snow was up to 68 cm. The surface layer thickness varied from 0.5 to 35 cm with the snow grain size between 0.2 and 2.5 mm. The midday erythemally weighted UV albedo ranged from 0.6 to 0.8 in the accumulation period, and from 0.5 to 0.7 during melting. During the snow melt period, under cases of an almost clear sky and variable cloudiness, an unexpected diurnal decrease of 0.05 in albedo soon after midday, and recovery thereafter, was detected. This diurnal decrease in albedo was found to be asymmetric with respect to solar midday, thus indicating a change in the properties of the snow. Independent UV albedo results with two different types of instruments confirm these findings. The measured temperature of the snow surface was below 0°C on the following mornings. Hence, the reversible diurnal change, evident for ~1–2 h, could be explained by the daily metamorphosis of the surface of the snowpack, in which the temperature of the surface increases, melting some of the snow to liquid water, after which the surface freezes again.

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