I try to address relevant methodological questions in paleoclimate and climate data analysis with tools and techniques from classical statistics, machine learning, nonlinear time series analysis, and complex networks. The data are diverse and heterogeneous, arising from re-analysis, satellite radars, meteorological and hydrological station networks and paleoclimate proxy archives. Each data set has its own peculiarities and challenges, and in my experience, more often than not, we cannot apply existing methods ‘out-of-the-box’ to find the answers we wish to have. Rather, we have to adapt and extend the state-of-the-art to arrive at reliable results.
I have worked on abrupt transitions in climatic systems and how uncertainties impact our inferences on paleoclimate variability. I have also tried to unravel the interactions between climatic systems governing global temperature and how unsupervised learning can help us identify long-range interactions between oceans and rainfall. Part of my work also deals with climate networks, along with recurrence plots and extreme events.
- Our 2020 paper on how large volcanic eruptions modulate the coupling between the El Niño Southern Oscillation and the Indian Monsoon was taken up by various news sources such as Firstpost in India, and Scienmag in the US.
- Our 2019 paper on how complex networks can be used to study long-range connections between extreme rainfall was picked up by FOCUS Online, The Journal, le Scienze, Physics World, and EurekAlert!.
A. Banerjee, B. Goswami, Y. Hirata, D. Eroglu, B. Merz, J. Kurths, & N. Marwan, Recurrence analysis of extreme event like data, Nonlinear Processes in Geophysics Discussions (2020) 1-25.
M. Singh, R. Krishnan, B. Goswami, A. D. Choudhury, P. Swapna, R. Vellore, A. G. Prajeesh, N. Sandeep, C. Venkataraman, R. V. Donner, N. Marwan, J. Kurths, Fingerprint of volcanic forcing on the ENSO–Indian monsoon coupling, Science Advances 6 (2020) eaba8164.
S. Prasad, N. Marwan, D. Eroglu, B. Goswami, P. Mishra, B. Gaye, A. Anoop, N. Basavaiah, M. Stebich, A. Jehangir, Holocene climate forcings and lacustrine regime shifts in the Indian Summer Monsoon realm, Earth Surface Processes and Landforms (2020) (in press).
B. Goswami, A Brief Introduction to Nonlinear Time Series Analysis and Recurrence Plots, Vibration 2 (2019) 332–368.
A. Rheinwalt, B. Goswami, B. Bookhagen, A Network-Based Flow Accumulation Algorithm for Point Clouds: Facet-Flow Networks (FFNs), JGR Earth Surface 124 (2019) 2013–2033.
S. Breitenbach, B. Plessen, S. Waltgenbach, R. Tjallingii, J. Leonhardt, K. P. Jochum, H. Meyer, B. Goswami, N. Marwan, D. Scholz, Holocene interaction of maritime and continental climate in Central Europe: new speleothem evidence from Central Germany, Global and Planetary Change 176 (2019) 144–161.
N. Boers, B. Goswami, A. Rheinwalt, B. Bookhagen, B. Hoskins, J. Kurths, Complex networks reveal global pattern of extreme-rainfall teleconnections, Nature 566 (2019) 373–377.
- B. Goswami, N. Boers, A. Rheinwalt, N. Marwan, J. Heitzig, S. F. M.
Breitenbach, J. Kurths,
Abrupt transitions in time series with uncertainties,
B. Goswami, P. Schultz, B. Heinze, N. Marwan, B. Bodirsky, H. Lotze-Campen, J. Kurths, Inferring interdependencies from short time series, Proceedings of the Conference on Perspectives in Nonlinear Dynamics 1 (2017) 51–60.
F. A. Lechleitner, S. F. M. Breitenbach, H. Cheng, B. Plessen, K. Rehfeld, B. Goswami, N. Marwan, D. Eroglu, J. Adkins, G. Haug, Climatic and in-cave influences on δ18O and δ13C in a stalagmite from northeastern India through the last deglaciation, Quaternary Research 88 (2017) 458–471.
N. Boers, B. Goswami, M. Ghil, A complete representation of uncertainties in layer-counted paleoclimatic archives, Climate of the Past 13 (2017) 1169–1180.
A. M. T. Ramos, A. Builes-Jaramillo, G. Poveda, B. Goswami, E. E. N. Macau, J. Kurths, Recurrence measure of conditional dependence and applications, Physical Review E 95 (2017) 052206. doi:10.1103/PhysRevE.95.052206
F. A. Lechleitner, S. F. M. Breitenbach, K. Rehfeld, H. E. Ridley, Y. Asmerom, K. M. Prufer, N. Marwan, B. Goswami, D. J. Kennett, V. V. Aquino, V. Polyak, G. H. Haug, T. I. Eglinton, J. U. L. Baldini, Tropical rainfall over the last two millennia: evidence for a low-latitude hydrologic seesaw, Scientific Reports 7 (2017) 45809.
F. A. Lechleitner, J. U. L. Baldini, S. F. M. Breitenbach, J. Fohlmeister, C. McIntyre, B. Goswami, R. A. Jamieson, T. S. van der Voort, K. Prufer, N. Marwan, B. J.Culleton, D. J. Kennett, Y. Asmerom, V. Polyak, T. I. Eglinton, Hydrological and climatological controls on radiocarbon concentrations in a tropical stalagmite, Geochimica et Cosmochimica Acta 194 (2016) 233–252.
D. Traxl, N. Boers, A. Rheinwalt, B. Goswami, J. Kurths, The size distribution of spatiotemporal extreme rainfall clusters around the globe, Geophysical Research Letters 43 (2016) 9939–9947.
A. Rheinwalt, B. Goswami, N. Boers, J. Heitzig, N. Marwan, R. Krishnan and J. Kurths, “Teleconnections in Climate Networks: A Network of Networks Approach to Investigate the Influence of Sea Surface Temperature Variability on Monsoon Systems”, in: Machine Learning and Data Mining Approaches to Climate Science (2015) 23–33. Springer International Publishing.
B. Goswami, S. M. Shekatkar, A. Rheinwalt, G. Ambika, J. Kurths, A random interacting network model for complex networks, Scientific Reports 5 (2015) 18183.
S. Dey, B. Goswami, A. Joshi, A possible mechanism for the attainment of out-of-phase periodic dynamics in two chaotic subpopulations coupled at low dispersal rate, Journal of Theoretical Biology 367 (2015) 100–110.
B. Goswami, J. Heitzig, K. Rehfeld, N. Marwan, A. Ambili, S. Prasad, J. Kurths, Estimation of sedimentary proxy records together with associated uncertainty, Nonlinear Processes in Geophysics 21 (2014) 1093–1111.
S. Dey, B. Goswami, A. Joshi, Effects of symmetric and asymmetric dispersal on the dynamics of heterogeneous metapopulations: Two-patch systems revisited, Journal of Theoretical Biology 345 (2014) 52–60.
- B. Goswami, N. Marwan, G. Feulner, J. Kurths,
How do global temperature drivers influence each other? A network
perspective using recurrences,
European Physical Journal Special Topics
S. F. M. Breitenbach, K. Rehfeld, B. Goswami, J. U. L. Baldini, H. E. Ridley, D. J. Kennett, K. M. Prufer, V. V. Aquino, Y. Asmerom, V. J. Polyak, H. Cheng, J. Kurths, N. Marwan, COnstructing Proxy Records from Age models (COPRA), Climate of the Past 8 (2012) 1765–1779.
B. Goswami, G. Ambika, N. Marwan, J. Kurths, On interrelations of recurrences and connectivity trends between stock indices, Physica A 391 (2012) 4364–4376.