Search Results - "Dhaniyala, S."

Computational fluid dynamics (CFD) simulation of a newly designed passive particle sampler by Sajjadi, H., Tavakoli, B., Ahmadi, G., Dhaniyala, S., Harner, T., Holsen, T.M.

“…In this work a series of computational fluid dynamics (CFD) simulations were performed to predict the deposition of particles on a newly designed passive dry…”
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Aircraft testing of the new Blunt-body Aerosol Sampler (BASE) by Moharreri, A, Craig, L, Dubey, P, Rogers, D. C, Dhaniyala, S

“…There is limited understanding of the role of aerosols in the formation and modification of clouds, partly due to inadequate data on such systems…”
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Nitric acid uptake on subtropical cirrus cloud particles by Popp, P. J., Gao, R. S., Marcy, T. P., Fahey, D. W., Hudson, P. K., Thompson, T. L., Kärcher, B., Ridley, B. A., Weinheimer, A. J., Knapp, D. J., Montzka, D. D., Baumgardner, D., Garrett, T. J., Weinstock, E. M., Smith, J. B., Sayres, D. S., Pittman, J. V., Dhaniyala, S., Bui, T. P., Mahoney, M. J.

“…The redistribution of HNO3 via uptake and sedimentation by cirrus cloud particles is considered an important term in the upper tropospheric budget of reactive…”
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An analysis of large HNO3-containing particles sampled in the Arctic stratosphere during the winter of 1999/2000 by Northway, M. J., Gao, R. S., Popp, P. J., Holecek, J. C., Fahey, D. W., Carslaw, K. S., Tolbert, M. A., Lait, L. R., Dhaniyala, S., Flagan, R. C., Wennberg, P. O., Mahoney, M. J., Herman, R. L., Toon, G. C., Bui, T. P.

“…Large (>2 μm diameter) HNO3‐containing polar stratospheric cloud (PSC) particles were measured in situ by the NOAA NOy instrument on board the NASA ER‐2…”
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An Asymmetrical, Three-Dimensional Model for Fibrous Filters by Dhaniyala, Suresh

“…The flow in a filter media represented by a three-dimensional fiber arrangement has been modeled using a finite volume approach. This results in a better…”
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Trajectory studies of large HNO3-containing PSC particles in the Arctic: Evidence for the role of NAT by McKinney, K. A., Wennberg, P. O., Dhaniyala, S., Fahey, D. W., Northway, M. J., Künzi, K. F., Kleinböhl, A., Sinnhuber, M., Küllmann, H., Bremer, H., Mahoney, M. J., Bui, T. P.

“…Large (5 to >20 micron diameter) nitric-acid-containing polar stratospheric cloud (PSC) particles were observed in the Arctic stratosphere during the winter of…”
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Quantifying the rate of heterogeneous processing in the Arctic polar vortex with in situ observations of OH by Hanisco, T. F., Smith, J. B., Stimpfle, R. M., Wilmouth, D. M., Perkins, K. K., Spackman, J. R., Anderson, J. G., Baumgardner, D., Gandrud, B., Webster, C. R., Dhaniyala, S., McKinney, K. A., Bui, T. P.

“…We present simultaneous in situ observations of OH, HO2, ClONO2, HCl, and particle surface area inside a polar stratospheric cloud undergoing rapid…”
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Performance characterization of a laminar gas inlet by Yang, Da, Reza, Margarita, Mauldin, Roy, Volkamer, Rainer, Dhaniyala, Suresh

“…Aircraft-based measurements enable large-scale characterization of gas-phase atmospheric composition, but these measurements are complicated by the challenges…”
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Correction to “Nitric acid uptake on subtropical cirrus cloud particles” by Popp, P. J., Gao, R. S., Marcy, T. P., Fahey, D. W., Hudson, P. K., Thompson, T. L., Kärcher, B., Ridley, B. A., Weinheimer, A. J., Knapp, D. J., Montzka, D. D., Baumgardner, D., Garrett, T. J., Weinstock, E. M., Smith, J. B., Sayres, D. S., Pittman, J. V., Dhaniyala, S., Bui, T. P., Mahoney, M. J.

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Spectral analysis approach for assessing the accuracy of low-cost air quality sensor network data by Kumar, Vijay, Senarathna, Dinushani, Gurajala, Supraja, Olsen, William, Sur, Shantanu, Mondal, Sumona, Dhaniyala, Suresh

“…Extensive monitoring of particulate matter (PM) smaller than 2.5 µm, i.e., PM2.5, is critical for understanding changes in local air quality due to policy…”
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Stratospheric Aerosol Sampling: Effect of a Blunt-Body Housing on Inlet Sampling Characteristics by Dhaniyala, S., Wennberg, P. O., Flagan, R. C., Fahey, D. W., Northway, M. J., Gao, R. S., Bui, T. P.

“…During a campaign to study ozone loss mechanisms in the Arctic stratosphere (SOLVE), several instruments on NASA's ER-2 aircraft observed a very low number…”
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Observations of bromine monoxide transport in the Arctic sustained on aerosol particles by Peterson, Peter K, Pöhler, Denis, Sihler, Holger, Zielcke, Johannes, General, Stephan, Frieß, Udo, Platt, Ulrich, Simpson, William R, Nghiem, Son V, Shepson, Paul B, Stirm, Brian H, Dhaniyala, Suresh, Wagner, Thomas, Caulton, Dana R, Fuentes, Jose D, Pratt, Kerri A

“…The return of sunlight in the polar spring leads to the production of reactive halogen species from the surface snowpack, significantly altering the chemical…”
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COSPAR Sample Safety Assessment Framework (SSAF) by Kminek, Gerhard, Benardini, James N, Brenker, Frank E, Brooks, Timothy, Burton, Aaron S, Dhaniyala, Suresh, Dworkin, Jason P, Fortman, Jeffrey L, Glamoclija, Mihaela, Grady, Monica M, Graham, Heather V, Haruyama, Junichi, Kieft, Thomas L, Koopmans, Marion, McCubbin, Francis M, Meyer, Michael A, Mustin, Christian, Onstott, Tullis C, Pearce, Neil, Pratt, Lisa M, Sephton, Mark A, Siljeström, Sandra, Sugahara, Haruna, Suzuki, Shino, Suzuki, Yohey, van Zuilen, Mark, Viso, Michel

“…The Committee on Space Research (COSPAR) Sample Safety Assessment Framework (SSAF) has been developed by a COSPAR appointed Working Group. The objective of the…”
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Computational fluid dynamic modeling of two passive samplers by Thomas, Justin, Holsen, Thomas M., Dhaniyala, Suresh

“…To effectively use a passive sampler for monitoring trace contaminants in the gas-phase, its sampling characteristics as a function of ambient wind conditions…”
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The Detection of Large HNO3-Containing Particles in the Winter Arctic Stratosphere by Fahey, D. W., Gao, R. S., Carslaw, K. S., Kettleborough, J., Popp, P. J., Northway, M. J., Holecek, J. C., Ciciora, S. C., McLaughlin, R. J., Thompson, T. L., Winkler, R. H., Baumgardner, D. G., Gandrud, B., Wennberg, P. O., Dhaniyala, S., McKinney, K., Th. Peter, Salawitch, R. J., Bui, T. P., Elkins, J. W., Webster, C. R., Atlas, E. L., Jost, H., Wilson, J. C., Herman, R. L., Kleinböhl, A., von König, M.

“…Large particles containing nitric acid (HNO3) were observed in the 1999/2000 Arctic winter stratosphere. These in situ observations were made over a large…”
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Lee-wave clouds and denitrification of the polar stratosphere by Dhaniyala, Suresh, Mckinney, Karena A., Wennberg, Paul O.

“…We present a hypothesis that the known formation of nitric acid hydrates in lee‐wave ice clouds produces a “standing crop” of nitric acid trihydrate (NAT)…”
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Novel Aerosol/Gas Inlet for Aircraft-Based Measurements by Dhaniyala, Suresh, Flagan, Richard C., McKinney, Karena A., Wennberg, Paul O.

“…A novel inlet has been designed for selective sampling of gas and aerosol phases of volatile species from high-speed aircraft. A multistage flow system brings…”
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Theoretical Modeling of Filtration by Nonuniform Fibrous Filters by Dhaniyala, Suresh, Liu, Benjamin Y. H.

“…Modeling commercial filter media using classical theories results in incorrect filter pressure drop and efficiencies and this is attributed to media…”
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Novel Aerosol/Gas Inlet for Aircraft-Based Measurements by Dhaniyala, S, Flagan, R C, McKinney, K A, Wennberg, P O

“…A novel inlet has been designed for selective sampling of gas and aerosol phases of volatile species from high-speed aircraft. A multistage flow system brings…”
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Numerical schemes to model condensation and evaporation of aerosols by Dhaniyala, Suresh, Wexler, Anthony S.

“…A positive-definite scheme is developed to solve the aerosol condensation and evaporation problem. Bott's positive-definite advection scheme (Bott, 1989a) is…”
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