The phrase "warming period" refers to a time when temperatures are increasing on Earth, leading to a rise in overall atmospheric and surface temperatures. Full definition
For the past 2.5 million years, the earth has been in a cold period with lengthy ice ages, interrupted by brief warm periods of 10,000 years or so. (climatedollars.org)
It has been suggested that more males would be born during warmer periods [12]. (journals.plos.org)
- The Current Warming Period is neither unusual, nor remarkable, nor unprecedented in recent human history. (patch.com)