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CROP WATER USE ( HARGREAVES ET EQUATION) WOLFRAM ALPHA WIDGET
CROP WATER USE ( HARGREAVES ET EQUATION) NEW WOLFRAM ALPHA WIDGET. Reference: Hargreaves, G. H. and Z. A. Samani, Reference Crop Evapotranspiration from Temperature. Appl. Eng. Agric., ASAE. 1(2). 1985,. pp.96-99.
Widget Application: Suppose you want to schedule irrigation by replacing the water evapotranspired by your crop each day. 1. Click on the appropriate link to get yesterdays solar radiation for your location: Puerto Rico or Northern Caribbean, 2. Check the internet for the average daily air temperature at your location (average = (minimum + maximum)/2), 3. Get the appropriate crop coefficient for your crop from this link, and 4. Finally, enter solar radiation, air temperature and crop coefficient into the widget to estimate ET. Multiply ET x acres x 1069.0663 to get the number of gallons of water you need to apply to your field.
NASA: Human Activity, Not Solar Activity, Drives Global Warming and Returning to 350 ppm Is Needed to Stop It
MIT researcher discovers way to make solar panels from plants
Giant Crack in Antarctica About to Spawn New York-Size Iceberg
Explaining climate change science & rebutting global warming misinformation
Explaining climate change science & rebutting global warming misinformation
Do the arguments of the global warming skeptics hold water scientifically? The above website evaluates the validity of many of the common arguments made by global warming skeptics based on the scientific literature.
Did you know that between 60 and 80% of the food produced in most developing countries is produced by women
Did you know that “…up to 75% of people living in developing countries rely on agriculture for their livelihoods and that over 90% of Africa’s agricultural production comes from small-scale production. Many of these farmers are women, who play a critical role in food and nutrition security and are responsible for growing, buying, selling and cooking the food. Between 60 and 80% of the food produced in most developing countries is produced by women and in sub-Saharan Africa, the figure is between 80 and 90 per cent. Yet less than 2% of land in sub-Saharan Africa is owned by women.”
“Across Africa, farmers are experiencing unpredictable growing seasons, making the age-old art and science of farming a guessing game. It is estimated that by 2050, up to 25% of world food production could be lost as a result of climate change, water scarcity and land degradation. This, combined with an expected population of 9 billion in 2050, paints a frightening picture of what may lie ahead for the next generation.”
Excerpt from GIMAC speaking notes for Mary Robinson President, Mary Robinson Foundation – Climate Justice (MRFCJ)
Why women are world’s best climate change defense
The Mary Robinson Foundation – Climate Justice (MRFCJ)
The Mary Robinson Foundation – Climate Justice (MRFCJ) is a centre for thought leadership, education and advocacy on the struggle to secure global justice for those many victims of climate change who are usually forgotten – the poor, the disempowered and the marginalised across the world.
Bicentennial cycle of deep cooling starting in 2014 – another little ice age in 2055±11 years
Bicentennial cycle of deep cooling starting in 2014 – another little ice age in 2055±11 years
Interesting but odd assumptions. The article states:
“From early 90s we observe bicentennial decrease in both the TSI [total solar irradiance] and the portion of its energy absorbed by the Earth. The Earth as a planet will henceforward have negative balance in the energy budget which will result in the temperature drop in approximately 2014. Due to increase of albedo and decrease of the greenhouse gases atmospheric concentration the absorbed portion of solar energy and the influence of the greenhouse effect will additionally decline.”
I didn’t know that the planetary albedo was going to go up and the atmospheric CO2 concentration was going to go down during this century! The latest plot of CO2 from Mauna Loa indicates that the atmospheric concentration is still on an upward trend (see image below). This trend may very well continue with rapid economic development in countries like China and India. Whether planetary albedo will go up or down seems to be in debate. In any case it would be important for climate change models to incorporate the reduction in the predicted total solar irradiance. Are there any studies that have done this?
Image is from http://en.wikipedia.org/wiki/Carbon_dioxide
PRAGWATER 
