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Earth Science

D-Index
37
Citations
5165
World Ranking
6863
National Ranking
3

Overview

Tõnu Martma is affiliated with Tallinn University of Technology in Estonia. Their research predominantly lies within the field of Earth and Planetary Sciences, with a strong focus on various subfields including Atmospheric Science, Paleontology, Geochemistry and Petrology, Environmental Chemistry, and Mechanics of Materials.

The scientist's work covers several main topics that span paleontological and geological research and climate-related studies. These topics include:

  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Cryospheric Studies and Observations
  • Geochemistry and Elemental Analysis
  • Climate Change and Permafrost
  • Methane Hydrates and Related Phenomena
  • Atmospheric Chemistry and Aerosols

Tõnu Martma has contributed extensively to scientific literature, with recent publications addressing diverse geological and environmental issues. Notable papers include:

  • Marine redox variability from Baltica during extinction events in the latest Ordovician-early Silurian, 2020, published in Palaeogeography Palaeoclimatology Palaeoecology
  • Controls on the 14C Content of Dissolved and Particulate Organic Carbon Mobilized Across the Mackenzie River Basin, Canada, 2020, published in Global Biogeochemical Cycles
  • Measurement report: Spatial variations in ionic chemistry and water-stable isotopes in the snowpack on glaciers across Svalbard during the 2015-2016 snow accumulation season, 2021, published in Atmospheric Chemistry and Physics
  • Oxygenated conditions in the aftermath of the Lomagundi-Jatuli Event: The carbon isotope and rare earth element signatures of the Paleoproterozoic Zaonega Formation, Russia, 2020, published in Precambrian Research
  • A multi-proxy approach to constrain reducing conditions in the Baltic Basin during the late Silurian Lau carbon isotope excursion, 2021, published in Palaeogeography Palaeoclimatology Palaeoecology

Frequent collaborators in Tõnu Martma's research include:

  • Seth A. Young
  • Olle Hints
  • Jeremy D. Owens
  • Aivo Lepland
  • Christian Zdanowicz

The scholar's research has appeared repeatedly in several prominent scientific venues, illustrating a consistent engagement with the scientific community. Key publication outlets include:

  • Abstracts with Programs - Geological Society of America
  • Proceedings of the Estonian Academy of Sciences Geology
  • Palaeogeography Palaeoclimatology Palaeoecology
  • Atmospheric Chemistry and Physics
  • Global Biogeochemical Cycles

Best Publications

  • High-resolution stable isotope stratigraphy of Upper Ordovician sequences: Constraints on the timing of bioevents and environmental changes associated with mass extinction and glaciation

    P.J. Brenchley;G.A. Carden;L. Hints;D. Kaljo

  • Middle and Upper Ordovician carbon isotope chemostratigraphy in Baltoscandia: A correlation standard and clues to environmental history

    L. Ainsaar;D. Kaljo;T. Martma;T. Meidla

  • Carbon isotope event markers through the Wenlock–Pridoli sequence at Ohesaare (Estonia) and Priekule (Latvia)

    D Kaljo;T Kiipli;T Martma

  • Timescales of methane seepage on the Norwegian margin following collapse of the Scandinavian Ice Sheet

    Antoine Crémière;Aivo Lepland;Shyam Chand;Diana Sahy

  • Post-Hunnebergian Ordovician carbon isotope trend in Baltoscandia, its environmental implications and some similarities with that of Nevada

    Dimitri Kaljo;Tõnu Martma;Tõnis Saadre

  • Late Ordovician carbon isotope trend in Estonia, its significance in stratigraphy and environmental analysis

    Dimitri Kaljo;Linda Hints;Tõnu Martma;Jaak Nõlvak

  • Implications of Gondwana glaciations in the Baltic late Ordovician and Silurian and a carbon isotopic test of environmental cyclicity

    Dimitri Kaljo;Tõnu Martma;Peep Männik;Viive Viira

  • Effect of periodic melting on geochemical and isotopic signals in an ice core from Lomonosovfonna, Svalbard

    V. A. Pohjola;J. C. Moore;E. Isaksson;T. Jauhiainen

  • Isotopic measurements of precipitation on central Asian glaciers (Southeastern Tibet, northern Himalayas, central Tien Shan)

    Vladimir Aizen;Elena Aizen;John Melack;Tonu Martma

  • Thousand years of winter surface air temperature variations in Svalbard and northern Norway reconstructed from ice-core data

    Dmitri Divine;Elisabeth Isaksson;Tonu Martma;Harro A. J Meijer

  • Snow contribution to first-year and second-year Arctic sea ice mass balance north of Svalbard

    Mats A. Granskog;Anja Rösel;Paul A. Dodd;Dmitry Divine

  • EVIDENCE FOR A WIDESPREAD CARBON ISOTOPIC EVENT ASSOCIATED WITH LATE MIDDLE ORDOVICIAN SEDIMENTOLOGICAL AND FAUNAL CHANGES IN ESTONIA

    Leho Ainsaar;Tonu Meidla;Tonu Martma

  • Testing the limits of Paleozoic chronostratigraphic correlation via high-resolution (<500 k.y.) integrated conodont, graptolite, and carbon isotope (δ13Ccarb) biochemostratigraphy across the Llandovery–Wenlock (Silurian) boundary: Is a unified Phanerozoic time scale achievable?

    Bradley D. Cramer;David K. Loydell;Christian Samtleben;Axel Munnecke

  • The Middle Caradoc Facies and Faunal Turnover in the Late Ordovician Baltoscandian palaeobasin

    Leho Ainsaar;Tõnu Meidla;Tõnu Martma

  • Contributions of autochthonous and allochthonous sources to dissolved organic matter in a large, shallow, eutrophic lake with a highly calcareous catchment

    Kaire Toming;Kaire Toming;Lea Tuvikene;Sirje Vilbaste;Helen Agasild

  • Effect of glacial drainage water on the CO2 system and ocean acidification state in an Arctic tidewater-glacier fjord during two contrasting years

    Agneta Fransson;Melissa Chierici;Daiki Nomura;Daiki Nomura;Mats A. Granskog

  • Carbon isotope stratigraphy in the latest Ordovician of Estonia

    D Kaljo;L Hints;T Martma;J Nõlvak

  • Fluid source and methane-related diagenetic processes recorded in cold seep carbonates from the Alvheim channel, central North Sea

    Antoine Crémière;Aivo Lepland;Shyam Chand;Diana Sahy

  • A new ice-core record from Lomonosovfonna, Svalbard: viewing the 1920-97 data in relation to present climate and environmental conditions

    Elisabeth Isaksson;Veijo Pohjola;Tauno Jauhiainen;John Moore

  • Unprecedented low twentieth century winter sea ice extent in the Western Nordic Seas since A.D. 1200

    M. Macias Fauria;A. Grinsted;A. Grinsted;S. Helama;J. Moore;J. Moore;J. Moore

  • Three global carbon isotope shifts in the Silurian of Podolia (Ukraine): stratigraphical implications

    Dimitri Kaljo;Volodymyr Grytsenko;Tõnu Martma;Mari-Ann Mõtus

  • A 160,000-year-old history of tectonically controlled methane seepage in the Arctic.

    Tobias Himmler;Diana Sahy;Tõnu Martma;Gerhard Bohrmann

Frequent Co-Authors

Elisabeth Isaksson
Elisabeth Isaksson Norwegian Polar Institute
Veijo A. Pohjola
Veijo A. Pohjola Uppsala University
John C. Moore
John C. Moore Beijing Normal University
Dmitry Divine
Dmitry Divine Norwegian Polar Institute
Harro A. J. Meijer
Harro A. J. Meijer University of Groningen
Jack Kohler
Jack Kohler Norwegian Polar Institute
R. S. W. van de Wal
R. S. W. van de Wal Utrecht University
Mats A. Granskog
Mats A. Granskog Norwegian Polar Institute
Jeremy D. Owens
Jeremy D. Owens Florida State University
Margit Schwikowski
Margit Schwikowski Paul Scherrer Institute

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