Pan Evaporation Trends and the Terrestrial Water Balance. I. Principles and Observations
Bibliographic Data
| ID | 7784843 |
|---|---|
| Authors | Michael L Roderick (0000-0002-3630-7739, Australian National University), Michael T Hobbins, Mike Hobbins (0000-0001-5540-8466), Graham D Farquhar (0000-0002-7065-1971) |
| Year | 2009 |
| Volume | 3 |
| Issue | 2 |
| Pages | 746-760 |
| Publication date | 2009-03-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Geography Compass (JOURNAL) |
| Journal identifiers | ISSN: 1749-8198 • E-ISSN: 1749-8198 |
| Publisher | Wiley (PUBLISHER • GB) |
| DOI | 10.1111/j.1749-8198.2008.00213.x |
| OpenAlex | W2128456456 |
| Language | EN |
| Citations received | 2 |
| References cited | 40 |
Pan evaporation is just that – it is the evaporation rate of water from a small dish located at the ground‐surface. Pan evaporation is a measure of the evaporative demand over terrestrial surfaces. Declines in pan evaporation have now been reported in many regions of the world. The trends vary from one pan to the next, but when averaged over many pans, they are typically in the range of −1 to −4 mm a −2 (mm per annum per annum). In energetic terms, a trend of −2 mm a −2 is equivalent to −0.16 W m −2 a −1 and over 30 years this is a change of −4.8 W m −2 . For comparison, the top‐of‐atmosphere forcing due to doubled CO 2 is estimated by the Intergovernmental Panel on Climate Change (IPCC) to be ~3.7 W m −2 . Hence, the magnitude of the pan evaporation trend is large. What is of even greater interest is the direction – a decline – given the well‐established warming of the last 30–50 years. In this article, the first in a two part series, we describe the underlying principles in using and interpreting pan evaporation data and then summarise the reported observations from different countries. In the second article, we describe the interpretation of the trends in terms of changes in the terrestrial water balance
Atmospheric sciences · Climate change · Climatology · Evaporation · Geography · Meteorology · Pan evaporation · Physical geography · Potential evaporation · Water balance · Atmospheric and Environmental Gas Dynamics · Atmospheric Ozone and Climate · Climate variability and models · Environmental Science · Materials Science · Geology · Oceanography
| Unique citing works | 2 |
|---|---|
| Citations per year | 0,12 |
| Citation span | 2009 - 2019 (11) |
| Citation velocity | historical |
| Highly cited | No |
| Citation types | Neutral: 2 |