Palaeoecological reconstruction of Global Environmental changes at the Younger Dryas Onset Czech-American Scientific Cooperation, project of the Ministry of Education, Youth and Sports (MEYS),
program Inter-Excellence, sub-program Inter-Action, project no. LTAUSA19141
Duration: November 1, 2019 - December 31, 2022 (38 months)
List of sites:
Černé Lake (in Czech "Černé jezero") – 49°10.77' N, 13°10.98' E
Čertovo Lake (in Czech "Čertovo jezero") – 49°9.90' N, 13°11.79' E
Stará Jímka (in Czech "Stará jímka") – 49°4.02' N, 13°24.25' E
Birch Lake – 64°18.85' N, 146°39.65' W
Windmill Lake – 63°39.52' N, 148°48.28' W
Study sites in Czechia – Černé Lake (CN), Čertovo Lake (CL), and Stará Jímka (SJ).
Study sites in Alaska – Windmill Lake and Birch Lake.
Photos of sites:
Alaska: Birch Lake
Alaska: Windmill Lake
The Bohemian Forest: Černé Lake (CN)
The Bohemian Forest: Čertovo Lake (CL).
The Bohemian Forest: Stará Jímka paleolake (SJ).
The Bohemian Forest: Stará Jímka paleolake (SJ).

January 2nd, 2023

The final defence of the project will be on Thursday, January 12 trough Zoom. Link to video summarizing the project scientific output recorded by principle investigator of the project PAGEO Günther Kletetschka is available in menu Output.


December 20th, 2022

The complete list of 20 published scientific artricles with links and one published book is available in the Output menu.


December 12th, 2022

The list of unpublished work in various stage of preparatiom list is available in the Output menu.


April  16th, 2022

New paper published about Tunguska event:

Suzdalevo Lake (Central Siberia, Russia)—A Tunguska Event-Related Impact Crater?


November 17th, 2021

New paper published in Scientific Reports by Günther Kletetschka, Radana Kavková and Hakan Ucar:

Plasma shielding removes prior magnetization record from impacted rocks near Santa Fe, New Mexico


October 5th, 2021

Visiting scientist in University of Alaska Günther Kletetschka was interviewed  by the local TV regarding new publication in Scientific reports on Tunguska size airburst in the Dead Sea area ~ 3600 years ago.



October, 2021

Working stage of the Czech team leader Günther Kletetschka and the team member Daniel Vondrák in the University of Alaska.

Joined work on the project data and results, visiting of lakes, lake-catchment analyses by aerial photography and magnetism devices using drone, discussion of publication strategy with American partner.


August 23-27, 2021

Fiel sampling campaign in the Bohemian Forest.

Analyses of the sediment depth profile by an advanced geophysical device (georadar) in Stara Jimka Paleolake.


May 17th, 2021

Interview of the Czech team leader Gunther Kletetschka in the Czech TV

Czech TV Interview


Oct. 22nd, 2020

Czech team sampling campaign in the Bohemian Forest


Oct. 2nd, 2020

Other scientific article was published by Kolokočník et al. in Planetary and Space Science:

Gravity strike angles: a new approach and tool
to estimate the direction of impactors of meteoritic craters.


Sep. 7th, 2020

Czech and American tream joined et

Birch Lake coring in Alaska.


Aug. 28th, 2020

The new scientific article was published:

Holcová et al., 2020.


Aug. 24th, 2020

Czech and American tream joined et

Windmill Lake coring in Alaska.


Aug. 12th, 2020

A new peer reviewed popularization paper
Co způsobilo poslední vzepětí doby ledové?
written by Daniel Vondrák and Günther Kletetschka
was published in Vesmír


Apr. 8th, 2020

A new paper on

A 200 km suspected impact crater Kotuykanskaya near Popigai, Siberia, in the light of new gravity aspects from EIGEN 6C4, and other data

written by Jaroslav Klokočník, Jan Kostelecký, Aleš Bezděk,
Gunther Kletetschka and Hana Staňková

was published in Scientific Reports


Mar. 12th, 2020

Reply to comments on

Extraordinary Biomass-Burning Episode and Impact Winter Triggered by the Younger Dryas Cosmic Impact ∼12,800 Years Ago: A Reply

by Wendy S. Wolbach, Joanne P. Ballard, Paul A. Mayewski, Andrei Kurbatov, Ted E. Bunch, Malcolm A. LeCompte, Victor Adedeji, Isabel Israde-Alcántara, Richard B. Firestone, William C. Mahaney, Adrian L. Melott,Christopher R. Moore, William M. Napier, George A. Howard, Kenneth B. Tankersley, Brian C. Thomas, James H. Wittke, John R. Johnson, Siddhartha Mitra, James P. Kennett, Gunther Kletetschka, and Allen West


Mar. 9th, 2020

A new paper on

Support for two subglacial impact craters in northwest Greenland
from Earth gravity model EIGEN 6C4 and other data

written by Jaroslav Klokočník, Jan Kostelecký, Aleš Bezděk, Václav Cílek,
Gunther Kletetschka and Hana Staňková

is available in a pre-proof mode


Mar. 5th, 2020

A new paper in Scientific Reports on

Evidence of Cosmic Impact at Abu
Hureyra, Syria at the Younger Dryas
Onset (~12.8 ka): High-temperature
melting at >2200 °C.

by Andrew Moore, James P. Kennett, William M. Napier, Ted E. Bunch, James C. Weaver,
Malcolm LeCompte, A. Victor Adedeji, Paul Hackley, Gunther Kletetschka, Robert E.
Hermes, James H. Wittke, Joshua J. Razink, Michael William Gaultois, Allen West,

is available for download


Jan. 6th, 2020

Three successful project proposals will strengthen up our study of Younger Dryas causes. Look at for details.


Nov. 30th, 2019
Website going operational.

Nov. 22th, 2019
New dawn of the project in Alaska. The first meeting of the project leader Günther Kletetschka with American partners.


Nov. 20th, 2019
we started building this website, working towards the first public release


Last update: January 10, 2022
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