आईआईटीएम
IITM

70. Ghosh Jayashree, Kunal Chakraborty  Valsala V., Trishneeta Bhattacharya, Prasanna Kanti Ghoshal (2024), A Review of the Indian Ocean Carbon Dynamics, Acidity, and Productivity in a Changing Environment, Progress in Oceanography, Volume 221, 103210, https://doi.org/10.1016/j.pocean.2024.103210 

69. Lekshmi, S., Rajib Chattopadhyay, D. S, Pai, M. Rajeevan, Valsala, V. K. S. Hosalikar & M. Mohapatra (2023), On the relative role of east and west pacific sea surface temperature (SST) gradients in the prediction skill of Central Pacific NINO3.4 SST, Ocean Dynamics, Volume 73, pages 773–791, https://doi.org/10.1007/s10236-023-01581-9 

68. Chakraborty, K.,, A.P. Joshi, Prasanna Kanti Ghoshal, Jayashree Ghosh, Anirban Akhand, Trishneeta Bhattacharya, M.G. Sreeush, Valsala V. (2023), Mechanisms and drivers controlling spatio-temporal evolution of pCO2 and air-sea CO2 fluxes in the southern Java coastal upwelling system, Estuarine, Coastal and Shelf Science, Volume 293, https://doi.org/10.1016/j.ecss.2023.108509 

67. Anika Arora, Valsala V., Prasanth A. Pillai (2023), A contrast in biennial variability of rainfall between central India and the Western Ghats and its mechanisms, Dynamics of Atmospheres and Oceans, Volume 103, 101383, https://doi.org/10.1016/j.dynatmoce.2023.101383 

66. Sijikumar S., Anjumol Raju, Valsala V., Yogesh Tiwari, Girach I.A., Chaithanya D. Jain, M. Venkat Ratnam, High-Resolution Bayesian Inversion of Carbon Dioxide Flux Over Peninsular India, 2023, Atmospheric Environment, https://doi.org/10.1016/j.atmosenv.2023.119868.

65. Raju A., Sijikumar S., Deb Burman P.K., Valsala V., Tiwari Y.K., Mukherjee S., Lohani P., Kumar K., Very high-resolution Net Ecosystem Exchange over India using Vegetation Photosynthesis and Respiration Model (VPRM) simulations, Ecological Modelling, 481: 110340, July 2023, DOI:10.1016/j.ecolmodel.2023.110340, 1-12

64. Madkaiker K., Valsala V., Sreeush M.G., Mallissery A., Chakraborty K., Deshpande A., Understanding the seasonality, trends, and controlling factors of Indian Ocean acidification over distinctive bio-provinces, Journal of Geophysical Research: Biogeosciences, 128: e2022JG006926, January 2023, DOI:10.1029/2022JG006926, 1-18

63. Valsala, V. (2022), The fingerprint of Indian Ocean rain and river water in salinity and circulation, Deep Sea Research-I, Vol. 190, https://doi.org/10.1016/j.dsr.2022.103912

62. Valsala V., M. G. Prajeesh, S. Singh (2022), Numerical Investigation of Tropical Indian Ocean Barrier Layer variability, J. Geophysical Research, 
https://doi.org/10.1029/2022JC018637

61. Anjumol Raju, Sijikumar, S., Valsala, V. Yogesh K. Tiwari, Santanu Halder, I. A. Girach, Chaithanya D. Jain & M.. Venkatatnam (2022),  Regional estimation of methane emissions over the peninsular India using atmospheric inverse modelling, Environ Monit Assess 194, 647 https://doi.org/10.1007/s10661-022-10323-1

60. Faseela Hamza, Valsala V., H. Varikoden (2022), The puzzle of the anchovy–sardine inverse fishery at the south-eastern coast of the Arabian Sea and climate variability, Fish and Fisheries, https://doi.org/10.1111/faf.12667

59. Jayashree Ghosh, Kunal Chakraborty, Trishneeta Bhattacharya, Vinu Valsala, Balaji Baduru, Impact of coastal upwelling dynamics on the pCO2 variability in the southeastern Arabian Sea, Progress in Oceanography, 203, 2022, 102785, https://doi.org/10.1016/j.pocean.2022.102785.

58. Valsala V., Is Amundsen-Bellingshausen Seas-Low affecting trace gas air-sea fluxes in the Antarctic Ocean?, Deep Sea Research Part I, 183: 103725, May 2022, DOI:10.1016/j.dsr.2022.103725, 1-8

57. Anju, M., V.Valsala, B.R.Smitha, G.Bharathi and C.V.Naidu (2021), Observed denitrification in the northeast Arabian Sea during the winter-spring transition of 2009, Journal of Marine Systems, Volume 227, doi.org/10.1016/j.jmarsys.2021.103680

56. Halder, S., Y. K. Tiwari, V. Valsala, S. Sijikumar, R. Janardanan, S. Maksyutov, (2021), Benefits of satellite XCO2 and newly proposed atmospheric CO2 observation network over India in constraining regional CO2 fluxes Science of The Total Environment, 51508, doi.org/10.1016/j.scitotenv.2021.151508.

55. Chakraborty K., V. Valsala, T. Bhattacharya, J. Ghosh, (2021),  Seasonal cycle of surface ocean pCO2 and pH in the northern Indian Ocean and their controlling factors, Progress in Oceanography, Vol.198, doi.org/10.1016/j.pocean.2021.102683

54. Halder Santanu., Tiwari Y.K., Valsala V., Sreeush M.G., Sijikumar S., Janardanan R., Maksyutov S., Quantification of enhancement in atmospheric CO2 background due to Indian biospheric fluxes and fossil fuel emissions, Journal of Geophysical Research: Atmospheres, 126: e2021JD034545, July 2021, DOI:10.1029/2021JD034545, 1-20

53. Hamza F., Anju M., Valsala V., Smitha B.R., A bioenergetics model for seasonal growth of Indian oil sardine (Sardinella longiceps) in the Indian west coast, Ecological Modelling, 456: 109661, September 2021, DOI:10.1016/j.ecolmodel.2021.109661

52. Maksyutov, S., Oda, T., Saito, M., Janardanan, R., Belikov, D., Kaiser, J. W., Zhuravlev, R., Ganshin, A., Valsala, V. K., Andrews, A., Chmura, L., Dlugokencky, E., Haszpra, L., Langenfelds, R. L., Machida, T., Nakazawa, T., Ramonet, M., Sweeney, C., and Worthy, D.: Technical note: A high-resolution inverse modelling technique for estimating surface CO2 fluxes based on the NIES-TM–FLEXPART coupled transport model and its adjoint, Atmos. Chem. Phys., 21, 1245–1266, https://doi.org/10.5194/acp-21-1245-2021, 2021.

51. Valsala V., Sreeush M.G., Anju M., Sreenivas P., Tiwari Y.K., Chakraborty K., Sijikumar S., An observing system simulation experiment for Indian Ocean surface pCO2 measurements, Progress in Oceanography, 194: 102570, June 2021, DOI: 10.1016/j.pocean.2021.102570, 1-14

50. Hamza F., Valsala V., Mallissery A., George G., Climate impacts on the landings of Indian oil sardine over the south-eastern Arabian Sea, Fish and Fisheries, 22, January 2021, DOI: 10.1111/faf.12513, 175-193

49.Valsala, V., M. G. Sreeush, and K. Chakraborty, (2020), IOD impacts on Indian the Ocean Carbon Cycle, Journal of Geophysical Research, https://doi.org/10.1029/2020JC016485

48. Anju M., Sreeush M.G, Valsala V., Smitha B.R., Hamza F., Bharathi G., Naidu C.V., Understanding the role of nutrient limitation on plankton biomass over Arabian Sea via 1‐D coupled biogeochemical model and Bio‐Argo observations, Journal of Geophysical Research: Oceans, 125: e2019JC015502, June 2020, DOI:10.1029/2019JC015502, 1-28

47. Praveen V., ValsalaV. , AjayamohanR.S. , Balasubramanian S., Oceanic mixing over the Northern Arabian sea in a warming scenario: Tug of war between wind and buoyancy forces, Journal of Physical Oceanography, 50, March 2020, DOI: 10.1175/JPO-D-19-0173.1, 945–964

46. Tiwari Y.K., Guha T., Valsala V., Lopez A.S., Cuevas C., Fernandez R.P., Mahajan A.S., Understanding atmospheric methane sub-seasonal variability over India, Atmospheric Environment, 223:117206, February 2020, DOI:10.1016/j.atmosenv.2019.117206, 1-10

45. Janardanan R., Maksyutov S., Tsuruta A., Wang F., Tiwari Y.K., Valsala V., Ito A., Yoshida Y., Kaiser J.W., Janssens-Maenhout G., Arshinov M., Sasakawa M., Tohjima Y., Worthy D.E.J., Dlugokencky E.J., Ramonet M., Arduini J., Lavric J.V., Piacentino S., Krummel P.B., Langenfelds R.L., Mammarella I., Matsunaga T., Country-scale analysis of methane emissions with a high-resolution inverse model using GOSAT and surface observations, Remote Sensing, 12:375, February 2020, DOI:10.3390/rs12030375, 1-24

44. Singh, S., V. Valsala, A. G. Prajeesh, S. Balasubramanian, (2019). On the variability of Arabian Sea mixing and its energetics. Journal of Geophysical Research: Oceans,124. https://doi.org/10.1029/2019JC015334

43. Sreeush, M. G. V. Valsala, H. Santanu, S. Pentakota, K.V.S.R. Prasad, C.V. Naidu, R. Murtugudde, (2019) Biological production in the Indian Ocean upwelling zones - Part 2: Data based estimates of variable compensation depth for ocean carbon models via cyclo-stationary Bayesian Inversion., Deep Sea Research Part II, doi.org/10.1016/j.dsr2.2019.07.007.

42. Nalini K., Sijikumar S., Valsala V., Tiwari Y.K., Ramachandran R.(2019), Designing surface CO2 monitoring network to constrain the Indian land fluxes, Atmospheric Environment, dOI:10.1016/j.atmosenv.2019.117003

41. Sreeush M. G., R. Saran, V. Valsala, S. Pentakota, K.V. S.R. Prasad, R. Murtugudde (2019): Variability, trend and controlling factors of Ocean acidification over Western Arabian Sea upwelling region, Marine Chemistry, 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

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

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

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

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.

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

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.

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.

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.

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.

01. 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.