To see how important US science is, consider measurements of changes in ocean heat content. US data are ~53% of the total. Over half!
But removing the US data is worse than randomly removing 80% of the total data, because unlike other countries, the US makes measurements everywhere.

Critical dependence of global ocean heat monitoring on the ocean observing system - Nature Climate Change
International collaboration has facilitated a global ocean observing system, providing data to measure ocean heat content at a resolution that enables the tracking of climate change. This study looks at the contributing nations and the risks to the network under the current political and economic climate.
