Observations on the Temperatures of Arctic Plants and Their Environment

INTRODUCTION . . . . .499 METHODS . 500 LEAF TEMPERATURES . 504 Comparison of species .504 Orientation of the leaf .505 Effect of shading and clouds 507 Night temperatures .508 Effect of wind . 509 Daily records . 510 Comparative data for temperate regions 513 SOIL AND AIR TEMPERATURES 514 Surface temperatures .514 Temperature gradients .516 Daily records . 519 Notes on aspect .522 Notes on soil type and cover 524 DISCUSSION . . . . .526 SUMMARY . . . . .528 REFERENCES . . . . .530