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Daily reference crop evapotranspiration with reduced data sets in the humid environments of Azores islands using estimates of actual vapor pressure, solar radiation, and wind speed

Published on Nov 1, 2018in Theoretical and Applied Climatology 2.32
· DOI :10.1007/s00704-017-2329-9
Paula Paredes18
Estimated H-index: 18
(University of Lisbon),
J. C. Fontes4
Estimated H-index: 4
(University of the Azores)
+ 1 AuthorsLuis S. Pereira51
Estimated H-index: 51
(University of Lisbon)
Abstract
Reference crop evapotranspiration (ETo) estimations using the FAO Penman-Monteith equation (PM-ETo) require a set of weather data including maximum and minimum air temperatures (T max, T min), actual vapor pressure (e a), solar radiation (R s), and wind speed (u 2). However, those data are often not available, or data sets are incomplete due to missing values. A set of procedures were proposed in FAO56 (Allen et al. 1998) to overcome these limitations, and which accuracy for estimating daily ETo in the humid climate of Azores islands is assessed in this study. Results show that after locally and seasonally calibrating the temperature adjustment factor a d used for dew point temperature (T dew) computation from mean temperature, ETo estimations shown small bias and small RMSE ranging from 0.15 to 0.53 mm day−1. When R s data are missing, their estimation from the temperature difference (T max−T min), using a locally and seasonal calibrated radiation adjustment coefficient (k Rs), yielded highly accurate ETo estimates, with RMSE averaging 0.41 mm day−1 and ranging from 0.33 to 0.58 mm day−1. If wind speed observations are missing, the use of the default u 2 = 2 m s−1, or 3 m s−1 in case of weather measurements over clipped grass in airports, revealed appropriated even for the windy locations (u 2 > 4 m s−1), with RMSE < 0.36 mm day−1. The appropriateness of procedure to estimating the missing values of e a, R s, and u 2 was confirmed.
  • References (49)
  • Citations (4)
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References49
Newest
Published on Jan 1, 2018in Theoretical and Applied Climatology 2.32
Javier Almorox14
Estimated H-index: 14
(Technical University of Madrid),
Alfonso Senatore12
Estimated H-index: 12
(University of Calabria)
+ 1 AuthorsGiuseppe Mendicino11
Estimated H-index: 11
(University of Calabria)
When not all the meteorological data needed for estimating reference evapotranspiration ETo are available, a Penman–Monteith temperature (PMT) equation can be adopted using only measured maximum and minimum air temperature data. The performance of the PMT method is evaluated and compared with the Hargreaves–Samani (HS) equation using the measured long-term monthly data of the FAO global climatic dataset New LocClim. The objective is to evaluate the quality of the PMT method for different climate...
8 Citations Source Cite
Published on Aug 1, 2017in Water Resources Management 2.64
Luis S. Pereira51
Estimated H-index: 51
(University of Lisbon)
Abstract Population growth, increasing demands for food, ever-growing competition for water, reduced supply reliability, climate change and climate uncertainty and droughts, decline in critical ecosystems services, competition for land use, changing regulatory environments, and less participatory water resources governance are contributing to increasing difficulties and challenges in water resource management for agriculture and food. The need for sustainable food security for our global populat...
14 Citations Source Cite
Published on May 1, 2017in Icarus 2.98
Martin Turbet9
Estimated H-index: 9
(University of Paris),
Francois Forget54
Estimated H-index: 54
(University of Paris)
+ 1 AuthorsRobin Wordsworth21
Estimated H-index: 21
(Harvard University)
Abstract Mars was characterized by cataclysmic groundwater-sourced surface flooding that formed large outflow channels and that may have altered the climate for extensive periods during the Hesperian era. In particular, it has been speculated that such events could have induced significant rainfall and caused the formation of late-stage valley networks. We present the results of 3-D Global Climate Model simulations reproducing the short and long term climatic impact of a wide range of outflow ch...
13 Citations Source Cite
Published on Apr 1, 2017in International Journal of Climatology 3.10
Diogo S. Martins6
Estimated H-index: 6
(Instituto Superior de Agronomia),
Paula Paredes18
Estimated H-index: 18
(Instituto Superior de Agronomia)
+ 3 AuthorsLuis S. Pereira51
Estimated H-index: 51
(University of Lisbon)
Computing crop reference evapotranspiration (ETo) with the FAO Penman–Monteith method (PM-ETo) requires maximum and minimum air temperature, shortwave radiation, relative air humidity and wind speed. These data are often not available, thus requiring alternative computation procedures. Although some proposed approximations may provide ETo values with small estimation errors, the physics of the ET processes may then not be well described. The use of reanalysis data, which is common in climate stu...
6 Citations Source Cite
Published on Sep 1, 2016in Water Resources Management 2.64
Xiaodong Ren2
Estimated H-index: 2
(Inner Mongolia Agricultural University),
Zhongyi Qu7
Estimated H-index: 7
(Inner Mongolia Agricultural University)
+ 2 AuthorsLuis S. Pereira51
Estimated H-index: 51
(University of Lisbon)
When weather data sets available for computing the reference evapotranspiration are incomplete or of questionable quality, there is the need to replace the FAO Penman-Monteith (PM-ETo) method by approaches requiring reduced sets only, particularly maximum and minimum temperature. The Hargreaves-Samani (HS) equation and the PM-ETo using only temperature data (PMT) are considered in this study and their results are compared with those of the PM-ETo using full datasets. Daily data sets refer to the...
11 Citations Source Cite
Published on Sep 1, 2016in Phytocoenologia 1.72
Rui B. Elias10
Estimated H-index: 10
,
Artur Gil11
Estimated H-index: 11
+ 3 AuthorsFrancisco Reis4
Estimated H-index: 4
16 Citations Source Cite
Published on Aug 1, 2016in Theoretical and Applied Climatology 2.32
Gustavo Bastos Lyra9
Estimated H-index: 9
(Universidade Federal Rural do Rio de Janeiro),
Sidney Sara Zanetti7
Estimated H-index: 7
(Universidade Federal do Espírito Santo)
+ 4 AuthorsMarco Antonio Maringolo Lemes3
Estimated H-index: 3
(Federal University of Alagoas)
The monthly global solar irradiation (Hg) was estimated using the Hargreaves–Samani model (HS) with three different approaches for determining the kr coefficient and using an artificial neural network (ANN). The data consisted of long-term climate series measured at eight conventional meteorological stations in the state of Alagoas and its borders in northeastern Brazil. The approaches to determine the kr coefficient of the HS model included (i) the method proposed by Hargreaves (1994) (0.190 an...
3 Citations Source Cite
Published on Oct 1, 2015in Journal of Hydrology 3.73
Pau Martí17
Estimated H-index: 17
(Polytechnic University of Valencia),
Manuel Zarzo14
Estimated H-index: 14
(Polytechnic University of Valencia)
+ 1 AuthorsJoan Girona1
Estimated H-index: 1
Summary The application of simple empirical equations for estimating reference evapotranspiration (ET o ) is the only alternative in many cases to robust approaches with high input requirements, especially at the local scale. In particular, temperature-based approaches present a high potential applicability, among others, because temperature might explain a high amount of ET o variability, and also because it can be measured easily and is one of the most available climatic inputs. One of the mos...
19 Citations Source Cite
Published on Jan 1, 2015in Agricultural Water Management 3.18
Luis S. Pereira51
Estimated H-index: 51
(Instituto Superior de Agronomia),
Richard G. Allen52
Estimated H-index: 52
(University of Idaho)
+ 1 AuthorsDirk Raes38
Estimated H-index: 38
(Katholieke Universiteit Leuven)
Abstract The FAO Irrigation and Drainage Paper No 56 on Crop Evapotranspiration has been in publication for more than 15 years. The paper advanced the accuracy and consistency of operational computation of evapotranspiration (ET) for agricultural and other land use types. The paper included updated definition and procedures for computing reference ET, an update on estimating crop coefficients ( K c ), the adoption of the dual K c for separate estimation of crop transpiration and soil evaporation...
144 Citations Source Cite
Published on Nov 1, 2014in Theoretical and Applied Climatology 2.32
AladenolaOlanike5
Estimated H-index: 5
(McGill University),
A MadramootooChandra29
Estimated H-index: 29
(McGill University)
The accuracy of nine solar radiation (R s ) estimation models and their effects on reference evapotranspiration (ET o ) were evaluated using data from eight meteorological stations in Canada. The R s estimation models were FAO recommended Angstrom-Prescott (A-P) coefficients, locally calibrated A-P coefficients, Hargreaves and Samani (H-S) (1982), Annandale et al., (2002), Allen (1995), Self-Calibrating (S-C, Allen, 1997), Samani (2000), Mahmood and Hubbard (M-H) (2002), and Bristow and Campbell...
14 Citations Source Cite
Cited By4
Newest
Published on Apr 1, 2019in Agricultural Water Management 3.18
Paula Paredes18
Estimated H-index: 18
(Instituto Superior de Agronomia),
Luis S. Pereira51
Estimated H-index: 51
(Instituto Superior de Agronomia)
Abstract The computation of the reference crop evapotranspiration (ET o ) using the FAO Penman-Monteith equation (PM-ET o ) requires data on maximum and minimum air temperatures (T max , T min ), vapour pressure deficit (VPD), solar radiation (R s ) and wind speed at 2 m height (u 2 ). However, those data are often not available, or data sets may be incomplete or have questionable quality. Various procedures were proposed in FAO56 to overcome these limitations and an abundant literature has been...
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Published on Mar 19, 2019in Theoretical and Applied Climatology 2.32
Zhengyao Liu1
Estimated H-index: 1
(Shaanxi Normal University),
Zhibao Dong (Shaanxi Normal University)+ 2 AuthorsNan Xiao2
Estimated H-index: 2
(Shaanxi Normal University)
The characteristics of eolian sand activity are greatly influenced by the wind regime, and wind regimes have been changing around the world in response to climate change. This has also been true in the desert area of northwestern China since 1965, and these changes have changed the region’s landforms, sandstorm frequency, and desertification. In this study, we analyzed the temporal and spatial variation of the region’s near-surface wind field since 1965. We found an average annual wind speed dur...
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Published on Nov 1, 2018in Agricultural Water Management 3.18
Paula Paredes18
Estimated H-index: 18
(Instituto Politécnico Nacional),
Diogo S. Martins6
Estimated H-index: 6
(Instituto Superior de Agronomia)
+ 2 AuthorsCarlos Pires10
Estimated H-index: 10
(University of Lisbon)
Abstract This study aims at assessing the accuracy of estimating daily grass reference evapotranspiration (PM-ET o ) computed with ERA-Interim reanalysis products, as well as to assess the quality of reanalysis products as predictors of daily maximum and minimum temperature, net radiation, dew point temperature and wind speed, which are used to compute PM-ET o . With this propose, ET o computed from local observations of weather variables in 24 weather stations distributed across Continental Por...
1 Citations Source Cite