Search Results - "Uttal, T"

Aerosol size distribution seasonal characteristics measured in Tiksi, Russian Arctic by Asmi, E, Kondratyev, V, Brus, D, Laurila, T, Lihavainen, H, Backman, J, Vakkari, V, Aurela, M, Hatakka, J, Viisanen, Y, Uttal, T, Ivakhov, V, Makshtas, A

“…Four years of continuous aerosol number size distribution measurements from the Arctic Climate Observatory in Tiksi, Russia, are analyzed. Tiksi is located in…”
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East Siberian Arctic background and black carbon polluted aerosols at HMO Tiksi by Popovicheva, O., Diapouli, E., Makshtas, A., Shonija, N., Manousakas, M., Saraga, D., Uttal, T., Eleftheriadis, K.

“…Assessment of Arctic pollution is hampered by a lack of aerosol studies in Northern Siberia. Black carbon observations were carried out at the…”
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An annual cycle of Arctic cloud characteristics observed by radar and lidar at SHEBA by Intrieri, J. M., Shupe, M. D., Uttal, T., McCarty, B. J.

“…The temporal distributions of cloudiness, vertical distribution of cloud boundary heights, and occurrence of liquid phase in clouds are determined from radar…”
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Evaluation of Arctic broadband surface radiation measurements by Matsui, N, Long, C. N, Augustine, J, Halliwell, D, Uttal, T, Longenecker, D, Niebergall, O, Wendell, J, Albee, R

“…The Arctic is a challenging environment for making in-situ surface radiation measurements. A standard suite of radiation sensors is typically designed to…”
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A comparison of cloud and boundary layer variables in the ECMWF forecast model with observations at Surface Heat Budget of the Arctic Ocean (SHEBA) ice camp by Beesley, J. A., Bretherton, C. S., Jakob, C., Andreas, E. L., Intrieri, J. M., Uttal, T. A.

“…Cloud and boundary layer variables from the European Centre for Medium‐Range Weather Forecasts (ECMWF) forecast model were compared with measurements made from…”
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On cloud radar and microwave radiometer measurements of stratus cloud liquid water profiles by Frisch, A. S., Feingold, G., Fairall, C. W., Uttal, T., Snider, J. B.

“…We show a method for determining stratus cloud liquid water profiles using a microwave radiometer and cloud radar. This method is independent of the radar…”
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Cloud cover comparisons of the MODIS daytime cloud mask with surface instruments at the north slope of Alaska ARM site by Berendes, T.A., Berendes, D.A., Welch, R.M., Dutton, E.G., Uttal, T., Clothiaux, E.E.

“…This paper compares daytime cloud fraction derived from the Moderate Resolution Imaging Spectrometer (MODIS), an imager on the National Aeronautics and Space…”
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Analysis of two independent methods for retrieving liquid water profiles in spring and summer Arctic boundary clouds by Löhnert, U., Feingold, G., Uttal, T., Frisch, A. S., Shupe, M. D.

“…A large number of all‐liquid, nondrizzling stratus clouds (163 hours of measurements) were observed with a dual‐channel microwave radiometer and a colocated…”
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Seasonality of aerosol optical properties in the Arctic by Schmeisser, Lauren, Backman, John, Ogren, John A, Andrews, Elisabeth, Asmi, Eija, Starkweather, Sandra, Uttal, Taneil, Fiebig, Markus, Sharma, Sangeeta, Eleftheriadis, Kostas, Vratolis, Stergios, Bergin, Michael, Tunved, Peter, Jefferson, Anne

“…Given the sensitivity of the Arctic climate to short-lived climate forcers, long-term in situ surface measurements of aerosol parameters are useful in gaining…”
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Current model capabilities for simulating black carbon and sulfate concentrations in the Arctic atmosphere: a multi-model evaluation using a comprehensive measurement data set by Eckhardt, S, Quennehen, B, Olivié, D. J. L, Berntsen, T. K, Cherian, R, Christensen, J. H, Collins, W, Crepinsek, S, Daskalakis, N, Flanner, M, Herber, A, Heyes, C, Hodnebrog, Ã, Huang, L, Kanakidou, M, Klimont, Z, Langner, J, Law, K. S, Lund, M. T, Mahmood, R, Massling, A, Myriokefalitakis, S, Nielsen, I. E, Nøjgaard, J. K, Quaas, J, Quinn, P. K, Raut, J.-C, Rumbold, S. T, Schulz, M, Sharma, S, Skeie, R. B, Skov, H, Uttal, T, von Salzen, K, Stohl, A

“…The concentrations of sulfate, black carbon (BC) and other aerosols in the Arctic are characterized by high values in late winter and spring (so-called Arctic…”
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Pan-Arctic surface ozone: modelling vs. measurements by Yang, Xin, Blechschmidt, Anne-M, Bognar, Kristof, McClure-Begley, Audra, Morris, Sara, Petropavlovskikh, Irina, Richter, Andreas, Skov, Henrik, Strong, Kimberly, Tarasick, David W, Uttal, Taneil, Vestenius, Mika, Zhao, Xiaoyi

“…Within the framework of the International Arctic Systems for Observing the Atmosphere (IASOA), we report a modelling-based study on surface ozone across the…”
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On Aethalometer measurement uncertainties and an instrument correction factor for the Arctic by Backman, John, Schmeisser, Lauren, Virkkula, Aki, Ogren, John A, Asmi, Eija, Starkweather, Sandra, Sharma, Sangeeta, Eleftheriadis, Konstantinos, Uttal, Taneil, Jefferson, Anne, Bergin, Michael, Makshtas, Alexander, Tunved, Peter, Fiebig, Markus

“…Several types of filter-based instruments are used to estimate aerosol light absorption coefficients. Two significant results are presented based on…”
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Snowfall and snow accumulation during the MOSAiC winter and spring seasons by Wagner, David N, Shupe, Matthew D, Cox, Christopher, Persson, Ola G, Uttal, Taneil, Frey, Markus M, Kirchgaessner, Amélie, Schneebeli, Martin, Jaggi, Matthias, Macfarlane, Amy R, Itkin, Polona, Arndt, Stefanie, Hendricks, Stefan, Krampe, Daniela, Nicolaus, Marcel, Ricker, Robert, Regnery, Julia, Kolabutin, Nikolai, Shimanshuck, Egor, Oggier, Marc, Raphael, Ian, Stroeve, Julienne, Lehning, Michael

“…Data from the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition allowed us to investigate the temporal dynamics of…”
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High gas-phase mixing ratios of formic and acetic acid in the High Arctic by Mungall, Emma L, Abbatt, Jonathan P. D, Wentzell, Jeremy J. B, Wentworth, Gregory R, Murphy, Jennifer G, Kunkel, Daniel, Gute, Ellen, Tarasick, David W, Sharma, Sangeeta, Cox, Christopher J, Uttal, Taneil, Liggio, John

“…Formic and acetic acid are ubiquitous and abundant in the Earth's atmosphere and are important contributors to cloud water acidity, especially in remote…”
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The De-Icing Comparison Experiment (D-ICE): a study of broadband radiometric measurements under icing conditions in the Arctic by Cox, Christopher J, Morris, Sara M, Uttal, Taneil, Burgener, Ross, Hall, Emiel, Kutchenreiter, Mark, McComiskey, Allison, Long, Charles N, Thomas, Bryan D, Wendell, James

“…Surface-based measurements of broadband shortwave (solar) and longwave (infrared) radiative fluxes using thermopile radiometers are made regularly around the…”
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Merged Observatory Data Files (MODFs): an integrated observational data product supporting process-oriented investigations and diagnostics by Uttal, Taneil, Hartten, Leslie M, Khalsa, Siri Jodha, Casati, Barbara, Svensson, Gunilla, Day, Jonathan, Holt, Jareth, Akish, Elena, Morris, Sara, O'Connor, Ewan, Pirazzini, Roberta, Huang, Laura X, Crawford, Robert, Mariani, Zen, Godøy, Ãystein, Tjernström, Johanna A. K, Prakash, Giri, Hickmon, Nicki, Maturilli, Marion, Cox, Christopher J

“…A large and ever-growing body of geophysical information is measured in campaigns and at specialized observatories as a part of scientific expeditions and…”
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The Year of Polar Prediction site Model Intercomparison Project (YOPPsiteMIP) phase 1: project overview and Arctic winter forecast evaluation by Day, Jonathan J, Svensson, Gunilla, Casati, Barbara, Uttal, Taneil, Khalsa, Siri-Jodha, Bazile, Eric, Akish, Elena, Azouz, Niramson, Ferrighi, Lara, Frank, Helmut, Gallagher, Michael, Godøy, Ãystein, Hartten, Leslie M, Huang, Laura X, Holt, Jareth, Di Stefano, Massimo, Suomi, Irene, Mariani, Zen, Morris, Sara, O'Connor, Ewan, Pirazzini, Roberta, Remes, Teresa, Fadeev, Rostislav, Solomon, Amy, Tjernström, Johanna, Tolstykh, Mikhail

“…Although the quality of weather forecasts in the polar regions is improving, forecast skill there still lags behind lower latitudes. So far there have been…”
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Special Observing Period (SOP) data for the Year of Polar Prediction site Model Intercomparison Project (YOPPsiteMIP) by Mariani, Zen, Morris, Sara M., Uttal, Taneil, Akish, Elena, Crawford, Robert, Huang, Laura, Day, Jonathan, Tjernström, Johanna, Godøy, Øystein, Ferrighi, Lara, Hartten, Leslie M., Holt, Jareth, Cox, Christopher J., O'Connor, Ewan, Pirazzini, Roberta, Maturilli, Marion, Prakash, Giri, Mather, James, Strong, Kimberly, Fogal, Pierre, Kustov, Vasily, Svensson, Gunilla, Gallagher, Michael, Vasel, Brian

“…The rapid changes occurring in the polar regions require an improved understanding of the processes that are driving these changes. At the same time, increased…”
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Cloud physics studies with 8 mm wavelength radar by Kropfli, R.A., Matrosov, S.Y., Uttal, T., Orr, B.W., Frisch, A.S., Clark, K.A., Bartram, B.W., Reinking, R.F., Snider, J.B., Martner, B.E.

“…Results from recent cloud experiments with an 8 mm wavelength Doppler radar demonstrate that millimeter wavelength radar can provide important new information…”
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Intercomparison of atmospheric water vapour measurements at a Canadian High Arctic site by Weaver, Dan, Strong, Kimberly, Schneider, Matthias, Rowe, Penny M, Sioris, Chris, Walker, Kaley A, Mariani, Zen, Uttal, Taneil, McElroy, C. Thomas, Vömel, Holger, Spassiani, Alessio, Drummond, James R

“…Water vapour is a critical component of the Earth system. Techniques to acquire and improve measurements of atmospheric water vapour and its isotopes are under…”
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