आईआईटीएम
IITM

• Tellus-A
• International Journal of Climatology
• Journal of Atmospheric and Solar-Terrestrial Physics
• Global and Planetary Change

• Introduction to Earth System Science in Center for Advanced Training, IITM, (2011-present)
• Computer course in C/C++ for M.Sc(Tech) Marine Geophysics, CUSAT, India (2001).

• National Institute for Environmental studies (NIES), Tsukuba, Japan. Co-investigator of modelling and assimilation of global oceanic fluxes of CO2 for GOSAT Project.

Publication (peer- reviewed)

2018

41. Sreeush M. G., R. Saran, V. Valsala, S. Pentakota, K.V. S.R. Prasad, R. Murtugudde (2018): Variability, trend and controlling factors of Ocean acidification over Western Arabian Sea upwelling region, Marine Chemistry, 2018, doi.org/10.1016/j.marchem.2018.12.002.

40. Singh S. and V. Valsala, (2018): Role of Subsurface ocean bias in coupled models in simulated interannual variability: A case study for Indian Ocean, Dynamics of Atmosphere and Ocean, doi.org/10.1016/j.dynatmoce.2018.10.001

39. Chakraborty, K., V. Valsala, G. V. M. Gupta and V. V. S. S. Sarma, (2018): Dominant biological control over upwelling on pCO2 in sea east of Sri Lanka, J. Geophysical Res., doi.org/10.1029/2018JG004446

38. Valsala, V., Singh S., & Balasubramanian, S. (2018),   A modeling study of interannual variability of Bay of Bengal Mixing and Barrier Layer Formation. Journal of Geophysical Research,123, doi.org/10.1029/2017JC013637

37. Guha T., Tiwari Y.K., Valsala V., Lin X., Ramonet M., Mahajan A., Datye A., Ravi Kumar K. (2018), What controls the atmospheric methane seasonal variability over India? Atmospheric Environment, 175, DOI:10.1016/j.atmosenv.2017.11.042, 83-91

36. Sreeush, M. G., Valsala, V., Pentakota, S., Prasad, K. V. S. R., and Murtugudde, R (2018), Biological production in the Indian Ocean upwelling zones – Part 1: refined estimation via the use of a variable compensation depth in ocean carbon models, Biogeosciences, 15, 1895-1918, https://doi.org/10.5194/bg-15-1895-2018

2017

35. Shirai T., M. Ishizawa, R. Zhuravlev, A. Ganshin, D. Belikov, M. Saito, T. Oda, V. Valsala, A. J. Gounez-Pelaez, R. Langenfelds and S. Maksyutov, (2017), A decadal inversion of CO2 using the Global Eulerian-Lagrangian Coupled Atmospheric model (GELCA): sensitivity to the ground-based observation network, Tellus - B, 69, April 2017, DOI:10.1080/16000889.2017.1291158, 1-24

2016

34. Valsala, V. and R. R. Rao (2016), Coastal Kelvin waves and dynamics of Gulf of Aden eddies, Deep Sea Research Part I: 116, 174-186.

33. Ravi Kumar, K., V. Valsala, Y. K. Tiwari, J.V. Revadekar, P. Pillai, S. Chakraborty, R. Murtugudde, (2016), Intra-seasonal variability of atmospheric CO2 concentrations over India during summer monsoons, Atmospheric Environment, Vol. 142, 229–237.

32. Praveen, V., R. S. Ajayamohan, V. Valsala, and S. Sandeep, (2016), Intensification of upwelling along Oman coast in a warming scenario, Geophys. Res. Lett., 43, doi:10.1002/2016GL069638.

31. Roxy, M. K., A. Modi, R. Murtugudde, V. Valsala, S. Panickal, S. Prasanna Kumar, M Ravichandran, M. Vichi and M. Lévy, (2016), A reduction in marine primary productivity driven by rapid warming over the tropical Indian Ocean, Geophysical Res. Letters, 43 (2), 826-833.

30. Revadekar, J. V. K. Ravi Kumar, Yogesh K. Tiwari, V. Valsala, (2016), Variability in AIRS CO 2 during active and break phases of Indian summer monsoon, Science of The Total Environment, Volume 541, 15,  1200–1207

2015

29. Valsala, V., and R. Murtugudde, (2015), Mesoscale and Intraseasonal Air-Sea CO2 Exchanges in the Western Arabian Sea during Boreal Summer, Deep Sea Research-I, doi:10.1016/j.dsr.2015.06.001

28. Rödenbeck, C., Bakker, D. C. E., Gruber, N., Iida, Y., Jacobson, A. R., Jones, S., Landschützer, P., Metzl, N., Nakaoka, S., Olsen, A., Park, G.-H., Peylin, P., Rodgers, K. B., Sasse, T. P., Schuster, U., Shutler, J. D., Valsala, V., Wanninkhof, R., and Zeng, J.: Data-based estimates of the ocean carbon sink variability – first results of the Surface Ocean pCO2 Mapping intercomparison (SOCOM), (2015), Biogeosciences, 12, 7251-7278, doi:10.5194/bg-12-7251-2015.

27. Sabu, P., J. V. George, N. Anilkumar, R. Chacko, V. Valsala, C.T. Achuthankutty, (2015), Observations of watermass modification by mesoscale eddies in the subtropical frontal region of the Indian ocean sector of southern ocean, Deep Sea Research-II, doi:10.1016/j.dsr2.2015.04.010

2014

26. Valsala, V., M. Roxy, K. Ashok and R. Murtugudde, Spatio-temporal characteristics of seasonal to multidecadal variability of pCO2 and air-sea CO2 fluxes in the equatorial Pacific Ocean, (2014), Journal of Geophysical Research, 119, DOI:10.1002/2014JC010212, 8987-9012.

25. Takagi, H., Houweling, S., Andres, R. J., Belikov, D., Bril, A., Boesch, H., Butz, A., Guerlet, S., Hasekamp, O., Maksyutov, S., Morino, I., Oda, T., O'Dell, C. W., Oshchepkov, S., Parker, R., Saito, M., Uchino, O., Yokota, T., Yoshida, Y., and Valsala, V. (2014), Influence of differences in current GOSAT XCO2 retrievals on surface flux estimation, Geophys. Res. Lett., 41, 2598-2605, doi:10.1002/2013GL059174.

24.  Ishii, M., Feely, R. A., Rodgers, K. B., Park, G.-H., Wanninkhof, R., Sasano, D., Sugimoto, H., Cosca, C. E., Nakaoka, S., Telszewski, M., Nojiri, Y., Mikaloff Fletcher, S. E., Niwa, Y., Patra, P. K., Valsala, V., Nakano, H., Lima, I., Doney, S. C., Buitenhuis, E. T., Aumont, O., Dunne, J. P., Lenton, A., and Takahashi, T. (2014), Air–sea CO2 flux in the Pacific Ocean for the period 1990–2009, Biogeosciences, 11, 709-734, doi:10.5194/bg-11-709-2014.

2013

23. Valsala, V., Y. K. Tiwari, P. Pillai, M. Roxy, S. Maksyutov and R. Murtugudde, (2013), Intraseasonal variability of terrestrial biospheric CO2 fluxes over India during summer monsoons,  J. Geophys. Res., doi: 10.1002/jgrg.20037.

22. Valsala, V., S. Maksyutov, (2013), Interannual variability of the air–sea CO2 flux in the north Indian Ocean, Ocean Dynamics,  DOI:10.1007/s10236-012-0588-7, 1-14

21.  Sarma, V. V. S. S., Lenton, A., Law, R. M., Metzl, N., Patra, P. K., Doney, S., Lima, I. D., Dlugokencky, E., Ramonet, M., and Valsala, V., (2013), Sea–air CO2 fluxes in the Indian Ocean between 1990 and 2009, (2013): Biogeosciences, 10, 7035-7052, doi:10.5194/bg-10-7035-2013.

20.  Maksyutov, S., Takagi, H., Valsala, V., Saito, M., Oda, T., Saeki, T., Belikov, D. A., Saito, R., Ito, A., Yoshida, Y., Morino, I., Uchino, O., Andres, R. J., and Yokota, T., (2013), Regional CO2 flux estimates for 2009–2010 based on GOSAT and ground-based CO2 observations, Atmos. Chem. Phys., 13, 9351-9373, doi:10.5194/acp-13-9351-2013

19.  Saeki, T., S. Maksyutov, M. Sasakawa, T. Machida, M. Arshinov, P. Tans, T. J. Conway, M. Saito, V. Valsala, T. Oda3,6, R. J. Andres , D. Belikov: (2013), Carbon flux estimation for Siberia by inverse modeling constrained by aircraft and tower CO2 measurements, J. Geophys. Res. Atmos., 118, doi:10.1002/jgrd.50127.

18.  Saeki T., Maksyutov S., Saito M., Valsala V., Oda T., Andres R. J., Belikov D., Tans P., Dlugokencky E., Yoshida Y., Morino I., Uchino O., Yokota T., (2013),  Inverse modeling of CO2 fluxes using GOSAT data and multi-year ground-based observations,  SOLA, 9, DOI:10.2151/sola.2013-011, 45-50

17. Tiwari Y.K., Valsala V., Vellore R.K., Kunchal R.K., (2013), Effectiveness of surface monitoring stations in representing regional CO2 emissions over India, Climate Research, 56, DOI:10.3354/cr01149, 121-129

16. Ravi Kumar K., Y. K. Tiwari, V. Valsala, R. Murtugudde, (2013), On understanding of land-ocean CO2 contrast over Bay of Bengal: A case study during 2009 summer monsoon, Environmental Science and Pollution Research, DOI: 10.1007/s11356-013-2386-2

2012

15. Ganshin, A., Oda, T., Saito, M., Maksyutov, S., Valsala, V., Andres, R. J., Fisher, R. E., Lowry, D., Lukyanov, A., Matsueda, H., Nisbet, E. G., Rigby, M., Sawa, Y., Toumi, R., Tsuboi, K., Varlagin, A., and Zhuravlev, R. (2012): A global coupled Eulerian-Lagrangian model and 1 × 1 km CO2 surface flux dataset for high-resolution atmospheric CO2 transport simulations, Geosci. Model Dev., 5, 231-243, doi:10.5194/gmd-5-231-2012.

14. Valsala, V., S. Maksyutov, and R. G. Murtugudde, (2012), A window for carbon uptake in the southern subtropical Indian Ocean, Geophys. Res. Lett., doi:10.1029/2012GL052857

13. Valsala, V., Maksyutov, S., Telszewski, M., Nakaoka, S.-I., Nojiri, Y., Ikeda, M., and Murtugudde, R. (2012), Climate impacts on the structures of the North Pacific air-sea CO2 flux variability, Biogeosciences, 9, 477-492.

2011

12. Valsala, V., S. Maksyutov and R. Murtugudde, (2011), Interannual to Interdecadal Variabilities of the Indonesian Throughflow Source Water Pathways in the Pacific Ocean. Journal of Physical Oceanography., 41, 1921–1940.

11. Takagi H., T. Saeki, T. Oda, M. Saito, V. Valsala, D. Belikov, R. Saito, Y. Yoshida, (2011), On the Benefit of GOSAT Observations to the Estimation of Regional CO2 Fluxes, SOLA, 2011, Vol. 7, 161−164, doi:10.2151/sola.2011-041.

2010

10. Valsala V. and S. Maksyutov, (2010), A Short Surface Pathway of the Subsurface Indonesian Throughflow Water from the Java Coast Associated with Upwelling, Ekman Transport, and Subduction, International Journal of Oceanography, Vol. 2010, doi:10.1155/2010/540783

09. Valsala V., H. M. Alsibai, M. Ikeda and S. Maksyutov, (2010), Interannual variability of CFC-11 absorption by the ocean: an offline model study, Climate Dynamics , doi:10.1007/s00382-010-0784-4.

08. Valsala V., S. Maksyutov and R. Murtugudde, (2010), Possible Interannual to Interdecadal variabilities of the Indonesian Throughflow (ITF) water pathways in the Indian Ocean, J. Geophysical Research , doi:10.1029/2009JC005735.

07. Valsala V. and S. Maksyutov, (2010), Simulation and assimilation of global ocean pCO2 and air-sea CO2 fluxes using ship observations of surface ocean pCO2 in a simplified Biogeochemical offline model., Tellus-B, doi:10.1111/j.1600-0889.2010.00495.x.

06. Kurien, P., M. Ikeda, and V. Valsala, (2010), Mesoscale Variability along the East Coast of India in Spring as revealed from Satellite and OGCM simulations, J. Oceanography, Vol. 66, 273-289.

2009-2005

05. Valsala V., (2009), Different spreading of Somali and Arabian coastal upwelled waters in the northern Indian Ocean: A case study, J. Oceanography, Vol.65, Page 803-816.

04. Valsala V., (2008), The first and second baroclinic mode responses of tropical Indian Ocean to interannual equatorial wind anomalies, J. Oceanography Vol. 64 (No. 4), 479-494.

03. Valsala V., S. Maksyutov and M. Ikeda, (2008), Design and validation of an offline Oceanic Tracer Transport Model for Carbon Cycle Study, J. Climate , 21, 2752-2769.

02. Valsala V. and M. Ikeda, (2007), Pathways and effects of the Indonesian Throughflow water in the Indian Ocean using Particle trajectory and Tracers in an OGCM. J. Climate,, 20, 2994-3017.

01. Valsala V. and M. Ikeda, (2005), An extreme drought event in the 2002 summer Monsoon Rainfall and its mechanisms proved with a moisture flux analysis, Scientific Online Letters on the Atmosphere, Vol.1, 173-176.

 Monograph:

 1. Maksyutov S., Y. Nakatsuka, V. Valsala, M. Saito, N. Kadygrov, T. Aoiki, N. Eguchi, R.Hirata, M. Ikeda, G. Inoue, T. Nakazawa, R. Onishi, P. K. Patra, A. D. Richardson, T. Saeki and T. Yokota, (2010): Algorithm for carbon flux estimation using GOSAT observational data, CGER Supercomputer Monograph Report, Vol. 15, ISSN 1341-4356.