Inconvenient: new treeline paper suggests temperatures were warmer 9000 years ago
3 to 4 degrees centigrade warmer, in fact. Far greater than recent warming. The new paper, Kulman et al. 2018 relies on paleoclimatology, which as we’ve learned from Mann, can be taken with a grain of salt. Because trees may only grow within narrowly-defined temperature ranges and elevations above sea level, perhaps the most reliable…
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