Publications

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Peer reviewed publications

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• Lee, T. R., S. Pal, P. Krishnan, B. Hirth, M. Heuer, T. P. Meyers, R. D. Saylor, and J. Schroeder, 2023: On the efficacy of Monin-Obukhov and bulk Richardson surface-layer parameterizations over drylands. J. Appl. Meteor. Climatol., https://doi.org/10.1175/JAMC-D-23-0092.1

•  Gallo K., and P. Krishnan, 2022, "Evaluation of the bias in the use of clear-sky compared with all-sky observations of monthly and annual daytime Land Surface Temperature" ,Journal of Applied Meteorology and Climatology, DOI: https://doi.org/10.1175/JAMC-D-21-0240.1,Page(s): 1485–1495( PDF)

• Mahmud,K., R. L. Scott, J. A. Biederman, M. E. Litvak, T. Kolb, T. P. Meyers, P.Krishnan, V. Bastrikov, N. MacBean, 2021,Optimizing Carbon Cycle Parameters Drastically Improves Terrestrial Biosphere  Model Underestimates of Dryland Mean Net CO2 Flux and its Inter-Annual  Variability, Journal of Geophysical Research Biogeosciences, 126, e2021JG006400. https://doi.org/10.1029/2021JG006400 

• MacBean,N., R. L. Scott, J. Biederman, P. Peylin, T. Kolb, M. Litvak, P. Krishnan, T. P. Meyers, V. K. Arora, V. Bastrikov, D. Goll, D. L. Lombardozzi, J. E. M. S. Nabel, J. Pongratz, S. Sitch, A. P. Walker, S. Zaehle and D.J .Moore, 2021,Dynamic global vegetation models underestimate net CO2 flux mean and inter-annual variability in dryland ecosystems, Environmental Research Letters, DOI: 10.1088/1748-9326/ac1a38 [open access]

•  Krishnan,P., T.P Meyers, S. J. Hook, M. Heuer, D. Senn, E. J. Dumas (2020), Intercomparison of in-situ sensors for ground-based land surface temperature measurements, Sensors , 2020, 20(18), 5268; https://doi.org/10.3390/s20185268 [open access]

• Biederman, J. A., Scott, R. L., Bell, T. W., Bowling, D. R., Dore, S., Garatuza-Payan, J., Kolb, T. E., Krishnan, P., Krofcheck, D. J., Litvak, M. E., Maurer, G. E., Meyers, T. P., Oechel, W. C., Papuga, S. A., Ponce-Campos, G. E., Rodriguez, J. C., Smith, W. K., Vargas, R., Watts, C. J., Yepez, E. A. and Goulden, M. L. (2017), CO2 exchange and evapotranspiration across dryland ecosystems of southwestern North America. Glob Change Biol.2017; 00:1–18. https://doi.org/10.1111/gcb.13686

• Huang, M., P. Lee , R. McNider , J. Crawford , E. Buzay , J. Barrick , Y. Liu , P. Krishnan. Temporal and spatial variability of daytime land surface temperature in Houston: Comparing DISCOVER-AQ aircraft observations with the WRF model and satellites, Journal of Geophysical Research - Atmospheres(2016)-doi:10.1002/2015JD023996.

• Krishnan.P, J. Kochendorfer, E. J. Dumas, P. C. Guillevic, B. B. Baker, T. P. Meyers, and B. Martos. Comparison of in-situ, aircraft, and satellite Land Surface Temperature measurements over a NOAA Climate Reference Network Site, Remote Sensing of Environment 165 (2015) 249–264, doi:10.1016/j.rse.2015.05.011

• Wang,S., Pan,M., Mu, Q., Shi,X., Mao,J., Brümmer,C., Jassal,R.S., Krishnan,P., Li, J., and T.A. Black, Comparing evapotranspiration from eddy covariance measurements, water budgets, remote sensing, and land surface models over Canada, Journal of Hydrometeorology , 16, 1540–1560,2015  http://dx.doi.org/10.1175/JHM-D-14-0189.1

• Gaumont-Guay,D. , T.A. Black, A.G. Barr, T.J. Griffis, R.S. Jassal, P. Krishnan, N. Grant and Z. Nesic , Eight years of forest-floor CO2 exchange in a boreal black spruce forest: spatial integration and multi-temporal trends, 184 , 25– 35, Agricultural and Forest Meteorology, 2014 ( PDF)(http://dx.doi.org/10.1016/j.agrformet.2013.08.010)

• Krishnan, P., T. P. Meyers, R.L.Scott, L.Kennedy and M. Heuer, Energy exchange and evapotranspiration over two temperate semi-arid grasslands in North America, Agricultural and Forest Meteorology ,doi:10.1016/j.agrformet.2011.09.017, 2012( PDF)

• Dias, N. L., Hong, J., Leclerc, M. Y., Black, T. A., Z. Nesic and P. Krishnan, A Simple Method of Estimating Scalar Fluxes Over Forests [PDF] , Boundary-Layer Meteorol., 10.1007/s10546-009-9408-0, 2009 .

• Krishnan, P., Black, T. A., Jassal, R.S., B. Chen and Z. Nesic, Interannual variability of the carbon balance of three different-aged Douglas-fir stands in the Pacific Northwest, J. Geophys. Res., 114, G04011, doi:10.1029/2008JG000912, 2009 [PDF]

• Cheng, Y. B., Middleton, E. M., Hilker, T., Coops, N.C., Black, T. A., and P. Krishnan, Dynamics of spectral bio-indicators and their correlations with light use efficiency using directional observations at a Douglas-fir forest, Meas. Sci. Technol., 20 095107, doi:10.1088/0957-0233/20/9/095107, 2009

• Chen, B., Black, T. A., Coops, N.C., P. Krishnan, Jassal, R. S., Brümmer, C., and Z. Nesic. Seasonal controls on interannual variability in carbon dioxide exchange of a near-end-of rotation Douglas-fir stand in the Pacific Northwest, 1997 - 2006, Global Change Biology, DOI: 10.1111/j.1365-2486.2008.01832.x, 2009[PDF].

• Middleton, E.M., Cheng, Y.B., Hilker, T., Black, T. A., P. Krishnan, Coops, N.C., and K. L. Huemmrich. Linking Foliage Spectral Responses to Canopy Level Ecosystem Photosynthetic Light Use Efficiency at a Douglas-fir Forest in Canada, Canadian Journal of Remote Sensing, 35(2): 166-188, 2009.

• Zha, T., Barr, A. G., Black, T. A., J Harry McCaughey, J Bhatti, I Hawthorne, P Krishnan, J Kidston, N Saigusa, A Shashkov, Z Nesic, Carbon sequestration in boreal jack pine stands following harvesting, Global Change Biology,10.1111/j.1365-2486.2008.01817.x, 2009.

• Gaumont-Guay .D., Black, T.A., Mccaughey, H., Barr, A. G., Krishnan, P., Jassal, R. S., And Z. Nesic, Soil CO2 efflux in contrasting boreal deciduous and coniferous stands and its contribution to the ecosystem carbon balance, Global Change Biology, DOI: 10.1111/j.1365-2486.2008.01830.x, 2009.

• Krishnan, P., Black, T. A., Barr, A. G., Grant, N. J., Gaumont-Guay, D., and Z. Nesic. Factors Controlling the Interannual Variability in the Carbon Balance of a Southern Boreal Black Spruce Forest. J. Geophys. Res. – Atmospheres, D09109, doi:10.1029/2007JD008965, 2008 [PDF].

• Hilker, T., N. C. Coops, F. G. Hall, T. A. Black, B. Chen, P. Krishnan, M. A. Wulder, P. J. Sellers, E. M. Middleton, and K. F. Huemmrich, A modeling approach for upscaling gross ecosystem production to the landscape scale using remote sensing data, J. Geophys. Res.- Biogeosciences, 113, G03006, doi:10.1029/2007JG000666, 2008.

• Hilker, T., Coops, N.C., Hall, F.G., Black, T.A., Wulder, M.A. Nesic, Z., Krishnan, P., Separating physiologically and directionally induced changes in canopy reflectance using BRDF models. Remote Sensing of Environment, 112, 2777–2788, 2008[PDF]

• Hilker, T., Coops, N.C., Schwalm, C.R., Jassal, R.S., Black, T.A. and Krishnan, P., Effects of mutual shading of tree crowns on prediction of photosynthetic light use efficiency in a Coastal Douglas Fir Forest. Tree Physiology, 28, 825–834, 2008

• Krishnan, P., Black, T. A., Grant, N. J., Barr, A. G., Hogg, E. H., Jassal, R.S., Morgenstern, K., Impact of changing soil moisture distribution on net ecosystem productivity of a boreal aspen forest during and following drought, Agric. For. Meteorol, 208–223, 2006[ PDF].

• Krishnan, P., Kunhikrishnan, P. K., and Nair, S. M., Time-Height evolution of Intraseasonal Oscillations in the tropical lower atmosphere: multilevel wind observations using UHF Radar, Geophysical. Res.Lett, VOL. 32, L07805, doi: 10.1029/2004GL022019 2005[PDF].

• Ramana, M. V., Krishnan, P., Nair, S. M., and Kunhikrishnan, P. K.,Thermodynamic structure of the Atmospheric Boundary Layer over the Arabian Sea and the Indian Ocean during pre-INDOEX and INDOEX-FFP campaigns, Ann.Geophysis. 22, 2679 - 2691, 2004

• Krishnan, P., Kunhikrishnan, P. K., Ravindran, S., Ramachandran, R., Subrahamanyam. D.B., and Ramana. M.V.,Observations of the atmospheric surface layer parameters over a semi arid region during the solar eclipse of August 11th, 1999, Proc. Indian Acad. Sci (earth and planetary Science), 113, 353-363, 2004

• Ramana, M. V., Krishnan, P., and P. K. Kunhikrishnan, Surface Boundary layer over a tropical inland region: seasonal features, Boundary-Layer Meteorol., 111, 153-175, 2004[PDF].

• Krishnan, P., and Kunhikrishnan, P. K., Temporal variations of ventilation coefficient at a tropical Indian station using UHF wind profiler, Current Science, 86, 447-451, 2004 [PDF]

• Ramana, M. V., Krishnan, P., Nair, S. M., and P. K. Kunhikrishnan, Experimental observations of Air-Sea Parameters and Fluxes associated with anomalous event in the Indian Ocean during 1997-98 El Niño period, Atmospheric Research, 70, 21–32, 2004[PDF]

• Krishnan, P., Kunhikrishnan, P. K., Nair, S. M., Ravindran, S., A. R. Jain and Toshiaki kozu, Atmospheric Boundary Layer observations over Gadanki using Lower Atmospheric Wind Profiler: Preliminary Results, current science, 85, 75-79, 2003[PDF].

• Krishnan, P., and Kunhikrishnan, P. K., Some characteristics of Atmospheric surface layer over a tropical inland region during southwest monsoon period, Atmospheric Research, 62, 11-124, 2002[PDF].

• Krishnan, P., and P. K. Kunhikrishnan, A study on the effect of ventilation coefficient in the dispersion of pollutant over a tropical station, Indian Aerosol Science and Technology Association (IASTA) Bulletin, 291-293, 2002

• Kunhikrishnan. P. K., Nair, S. M., and Krishnan, P., Pollutant transport in a coastal ABL – A model simulation study, Indian Aerosol Science and Technology Association (IASTA) Bulletin, 294-297,2002.

• Subrahamanyam, D. B., Sen Gupta, K., Ravindran, S., and Krishnan, P., Study of sea breeze and land breeze along the west coast of Indian subcontinent over the latitude range 15N to 8N during INDOEX FFP-99 (SK-141) Cruise [PDF] , Current Science (supplement), 80, 161–165, 2001.

OTHER PUBLICATIONS

                                        Editorial

• Krishnan P, Wang S. Editorial for the Special Issue “Understanding Biosphere–Atmosphere Interactions with Remote Sensing”. Remote Sensing. 2023; 15(2):332. https://doi.org/10.3390/rs15020332

Papers in conference proceedings

• Middleton, E.M. , Cheng, Y.-B. , Hilker, T. , Huemmrich, K.F. , Blacks, T.A. , Krishnan, P. , Coops, N.C., Relating a spectral index from modis and tower-based measurements to ecosystem light use efficiency for a fluxnet-canada coniferous forest, 2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings; Boston, MA; 6 July 2008 through 11 July 2008

• Krishnan, P., and P. K. Kunhikrishnan, Signatures of the 30-60 day oscillation in the Inland Boundary Layer observed using UHF wind profiler, International conf on Scale interactions and variability of monsoon, Munnar, Kerala, 2003

• Ramachandran, R., D. Bala Subrahamanyam and Krishnan, P., Observed features of the Atmospheric Boundary Layer (ABL) and comparison with mesoscale model simulations at Kashidoo Island during INDOEX-IFP 99, International conf on Scale interactions and variability of variability of monsoon, Munnar, Kerala, 2003

• Krishnan, P., and P. K. Kunhikrishnan, A study on the effect of ventilation coefficient in the dispersion of pollutant over a tropical station, Bulletin IASTA 2002, 291-293.

• Kunhikrishnan. P. K., Nair, S. M., and Krishnan, P., Pollutant transport in a coastal ABL – A model simulation study, Bulletin IASTA 2002, 294-297.

• Krishnan, P., Ramana, M. V., and Kunhikrishnan, P. K., Surface similarity relations over tropical Indian stations, Proc. of 11th International Symposium of International Society of Acoustic Remote Sensing (ISARS), Rome, 2002, 335-338.

• Krishnan, P., and P. K. Kunhikrishnan, Observations of the convective boundary layer height and evolution over Gadanki, Proc. of 11th International Symposium of International Society of Acoustic Remote Sensing (ISARS), Rome, June 24 – 28, 2002, 247-250.

• Ravindran, S., P. K. Kunhikrishnan, Krishnan, P., and S. M. Nair, Observations on atmospheric boundary layer structure over a tropical inland station during Pre-monsoon period using wind profiler, Proc. of TROPMET 2001, Mumbai, India, 369-376

• Kunhikrishnan, P. K., Krishnan, P., Muraleedharan Nair, S., and Ravindran, S., Atmospheric Boundary layer studies using LAWP, Proc. of the fifth user scientist workshop-2001, NMRF, Gadanki, 1-9

• Kunhikrishnan. P.K., Nair. S. M., Ravindran, S., and Krishnan, P., Atmospheric boundary layer wind structure over Gadanki-A case Study, Proc. of MST-9-COST 76 SYMPOSIUM 2000, Toulouse, France, 319-322.

• Krishnan, P., Kunhikrishnan. P. K., Ravindran, S., Subrahamanyam, D. B., and Ramachandran, R., Response of surface layer wind and temperature spectra during the solar eclipse of August 11, 1999, Proc. of 10th International Symposium of International Society of Acoustic Remote Sensing (ISARS) 2000, Auckland, New Zealand, 346-348.

• 12. Ramana, M. V., Krishnan, P., Sen Gupta, K., Kunhikrishnan, P.K., and S. M. Nair, Description of ABL structure variation in time under varying phase of the monsoon over the Lucknow, India, Proc. of 10th International Symposium of International Society of Acoustic Remote Sensing (ISARS), 2000, Auckland, New Zealand, 350.

• Ramana, M. V., Krishnan, P., Kunhikrishnan. P. K., and Sen Gupta, K., Thermodynamic Structure of the Marine Boundary Layer and air-sea fluxes during INDOEX, Proc. of 10th International Symposium of International Society of Acoustic Remote Sensing (ISARS) 2000, Auckland, New Zealand, 352.

• Krishnan, P., Kunhikrishnan, P. K., Subrahamanyam, D.,B., Ravindran, S., Ramachandran, R., Sen Gupta. K., A case study of the surface boundary layer parameters over an inland station during monsoon period, Proc. of TROPMET 2000, Cochin, Kerala, India, 610 – 616, 2001

• Subrahamanyam, D.B., Sen Gupta. K., Ravindran, S., Kunhikrishnan, P. K., Ramachandran, R., Ramana, M.V., Krishnan, P., Variation of boundary layer parameters in the latitude range 15°N to 20°S and longitude range 63°E to 77°E during INDOEX, IFP-99, Proc. of TROPMET 2000, Cochin, 410 – 414

Scientific reports

• Subrahamanyam, D. B., Ramachandran, R., Sen Gupta, K., Krishnan, P., Kunhikrishnan, P. K., and Ravindran, S., Marine boundary Layer Studies during INDOEX, 1FP- 99, SPL scientific report: Sr:02:2001, pp82.

• Krishnan, P., Kunhikrishnan, P. K., Nair, S. M., Ravindran, S., and A. R. Jain, Lower atmospheric wind profiler at Gadanki: preliminary studies on Atmospheric boundary layer, SPL scientific report: Sr:04:2001, pp52.

• Ramachandran, R., Mohanty, U. C., Subrahamanyam, D. B. and Krishnan, P., Evaluation and verification of simulations of wind over south India using regional models MM5 and HRM during GSLV launch, SPL scientific report: Sr:01:2003.

Highlighted papers

• Highlighted paper by AGU :Krishnan, P., Black, T. A., Jassal, R.S., B. Chen and Z. Nesic, Interannual variability of the carbon balance of three different-aged Douglas-fir stands in the Pacific Northwest, J. Geophys. Res., 114, G04011, doi:10.1029/2008JG000912, 2009

• Hottest Article: The following article was listed under the hottest articles section of Science Direct (hottest as defined in www.sciencedirect.com). Krishnan, P., Black, T. A., Grant, N. J., Barr, A. G., Hogg, E. H., Jassal, R.S., Morgenstern, K., Impact of changing soil moisture distribution on net ecosystem productivity of a boreal aspen forest during and following drought, Agric. For. Meteorol, 208–223, 2006