Figure 2
From: Electron microscopy and calorimetry of proteins in supercooled water

Water phase diagram. The dark yellow arrow corresponds to immersion freezing experiments, and the green arrow to deposition freezing. The red curve indicates the ice saturation pressure (hice = 1), and the blue curve the saturation pressure of supercooled water (hSCW = 1). Created with OriginPro 9.0 (www.originlab.com/).