"It is clear that confronting the bushfire disaster in Australia requires both an immediate response and an ongoing investment in rebuilding the lives and livelihoods of those most affected by the fires across the country", said Rupert Murdoch, News Corp.'s executive chairman, in a statement.
"Kathryn and James' views on climate are well established and their frustration with some of the News Corp and Fox coverage of the topic is also well known", the pair told USA news website The Daily Beast.
Brutal. James, derided in hushed tones by Fox News staffers as the liberal son, left the family empire past year with a few billion to launch an investment company.
News Corp Australia, which publishes more than 140 newspapers and employs about 3,000 journalists in print, television, and online, has been repeatedly criticized for downplaying the effects of climate change.
A widely-shared article by The Australian detailing the number of people charged with arson since the beginning of the fire season was derided for being misleading and including a number of inaccuracies.
Murdoch columnists have described linking the fires to climate change as "hysterical" and "silly".
"I'm very comfortable staying in the background and continuing to work quietly".
But critics of News Corp have pointed to its comment articles and reporting of the alleged role of arson in the wildfires as minimising the impact of a changing climate.
"It's evidence of how high tensions are within the family over climate change", he said.
The accusations were levelled by commercial finance manager Emily Townsend in a company-wide email to staff.
"News Corp stands by its coverage of the bushfires. We respect Ms Townsend's right to hold her views but we do not agree with them", he said.
Last week a News Corp employee in Australia lashed out at the company's "irresponsible" coverage of the bushfire crisis.