An aerial view of floating ice taken by a drone launched from Greenpeace's Arctic Sunrise ship in the Arctic Ocean, September 15, 2020. Picture taken September 15, 2020. REUTERS/Natalie Thomas

Greenpeace's Arctic Sunrise ship navigates through floating ice in the Arctic Ocean, September 15, 2020. Picture taken September 15, 2020. Picture taken with a drone. REUTERS/Natalie Thomas TPX IMAGES OF THE DAY

Greenpeace's Arctic Sunrise ship navigates through floating ice in the Arctic Ocean, September 15, 2020. Picture taken September 15, 2020. Picture taken with a drone. REUTERS/Natalie Thomas

Greenpeace's Arctic Sunrise ship navigates through floating ice in the Arctic Ocean, September 15, 2020. Picture taken September 15, 2020. Picture taken with a drone. REUTERS/Natalie Thomas

Crew members look at the first piece of ice they spotted on the expedition onboard of the Greenpeace's Arctic Sunrise ship at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

Floating ice is seen during the expedition of the The Greenpeace's Arctic Sunrise ship at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

General view of the first large bit of ice seen by the crew of the Greenpeace's Arctic Sunrise ship at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

The Greenpeace's Arctic Sunrise ship is seen near floating ice at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas TPX IMAGES OF THE DAY

Pieces of floating ice with polar bear footprints on them are seen from the Greenpeace's Arctic Sunrise ship at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

Pieces of floating ice with polar bear footprints on them are seen from the Greenpeace's Arctic Sunrise ship at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

The Greenpeace's Arctic Sunrise ship is seen near floating ice at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

The Greenpeace's Arctic Sunrise ship is seen near floating ice at the Arctic Ocean, September 14, 2020. REUTERS/Natalie Thomas

El derretimiento del hielo marino ha abierto el paso a más navegación en el Ártico y a más contaminación

Arctic shipping lanes mapped with current sea ice extent, and the pollution caused by ship traffic in 2019

July Arctic sea ice extent anomalies

People visit Santa Claus Office located on the Arctic Circle near Rovaniemi, Finland December 13, 2019. Picture taken December 13, 2019. REUTERS/Attila Cser

A man dressed as Santa Claus poses for a picture near Santa Claus Office located on the Arctic Circle near Rovaniemi, Finland December 13, 2019. Picture taken December 13, 2019. REUTERS/Attila Cser

People visit Santa Claus Office located on the Arctic Circle near Rovaniemi, Finland December 13, 2019. Picture taken December 13, 2019. REUTERS/Attila Cser

The nuclear-powered icebreaker Arktika is seen drawn by tug boats as it starts the sea trials, in Saint Petersburg, Russia December 12, 2019. REUTERS/Anton Vaganov

The nuclear-powered icebreaker Arktika is seen drawn by tug boats as it starts the sea trials, in Saint Petersburg, Russia December 12, 2019. REUTERS/Anton Vaganov

Helen Julian, a volunteer from the Old Weather group, poses for a photograph at her laptop in Darlington, Britain, December 6, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Lee Smith

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, U.S., December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Old Weather volunteer Joan Arthur poses for a photograph at her home in Oxford, Britain, November 25, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 25, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Eddie Keogh

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Helen Julian, a volunteer from the Old Weather group, poses for a photograph in Darlington, Britain, December 6, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Lee Smith

Helen Julian, a volunteer from the Old Weather group, poses for a photograph in Darlington, Britain, December 6, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Lee Smith

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, sits for a portrait at the NOAA campus in Seattle, Washington, U.S., December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, sits for a portrait at the NOAA campus in Seattle, Washington, U.S., December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at his laptop in his home office in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, U.S., December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Helen Julian, a volunteer from the Old Weather group, poses for a photograph in Darlington, Britain, December 6, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Lee Smith

Helen Julian, a volunteer from the Old Weather group, poses for a photograph in Darlington, Britain, December 6, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Lee Smith

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Dr. Kevin Wood, a research scientist at the NOAA Pacific Marine Environmental Laboratory – University of Washington Joint Institute for the Study of the Atmosphere and Ocean, stands for a portrait at the NOAA campus in Seattle, Washington, U.S., December 6, 2019. Wood is the lead investigator on the Old Weather Arctic project, which uses volunteer-collected historical weather data from thousands of pages of ships' logs to help inform climate projections. Picture taken December 6, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Lindsey Wasson

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph in his home office in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph on his front porch Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph on his front porch in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS. REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph looking over the Pacific Ocean from the Dallas Road Waterfront Trail in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

Old Weather group volunteer Michael Purves poses for a photograph at Clover Point Park in Victoria, British Columbia, Canada, November 13, 2019. A group of far-flung volunteers called Old Weather is painstakingly extracting data from the handwritten logbooks of 19th-century ships to help us understand how the Earth's climate is changing. Founded a decade ago, Old Weather's volunteers have accumulated an astonishing 4 million observations of weather and ice, taken mostly from the logbooks of ships plying northern or Arctic routes. Picture taken November 13, 2019. To match Special Report CLIMATE-CHANGE/ICE-SHIPLOGS REUTERS/Kevin Light

The road along the Russian - Norway border is seen in Pasvik valley, Finnmark county, Norway, October 23, 2019. REUTERS/Maxim Shemetov

A group of reindeers cross the road along the Russian - Norway border in Pasvik valley, Finnmark county, Norway, October 23, 2019. REUTERS/Maxim Shemetov

Employees work at Kimek shipyard in Kirkenes, Norway, October 24, 2019. REUTERS/Maxim Shemetov

A pier and fishing gear storage is seen at Kimek shipyard in Kirkenes, Norway, October 24, 2019. REUTERS/Maxim Shemetov

A general view of houses in Kirkenes, Norway, October 24, 2019. REUTERS/Maxim Shemetov

A road sign lies on the grass in Kirkenes, Norway, October 26, 2019. REUTERS/Maxim Shemetov

U.S. marines from Fox Company, 2nd Battalion, 6th Marine Regiment, part of the Marine Rotational Force - Europe, take part in "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 29, 2019. REUTERS/Stoyan Nenov

The Aurora Borealis (Northern Lights) is seen over the World War II memorial in Abram Mys outside Murmansk, Russia, October 27, 2019. REUTERS/Maxim Shemetov

A Norwegian soldier is seen atop a tank during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 29, 2019. REUTERS/Stoyan Nenov

A Norwegian soldier is seen through the window of a military vehicle during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 29, 2019. REUTERS/Stoyan Nenov

Soldiers from the Combat Support Squadron of the First Battalion of the Northern Brigade of the Norwegian Army pack their camp in the morning during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 30, 2019. REUTERS/Stoyan Nenov

Soldiers from the Combat Support Squadron of the First Battalion of the Northern Brigade of the Norwegian Army warm themselves around a fire in their camp during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 29, 2019. REUTERS/Stoyan Nenov

Soldiers from Second Tank Squadron of the First Battalion of the Northern Brigade of the Norwegian Army prepare their tank during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 30, 2019. REUTERS/Stoyan Nenov

A soldier from Second Tank Squadron of the First Battalion of the Northern Brigade of the Norwegian Army is seen atop of a tank during "Reindeer 2" Norwegian-U.S. military drill in Setermoen, Norway, October 30, 2019. REUTERS/Stoyan Nenov