Introduction to MODIS Evapotranspiration (MOD16) - a free global dataset of ET & PET

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In this video I’m going to introduce you to the free MODIS Evapotranspiration product, MOD16. We will be using this data in the next video to calculate Evapotranspiration over a catchment. The purpose of this video is to give you some important background information.
Chapters
00:00 Introduction
00:23 Evaporation, Transpiration & Evapotranspiration
01:18 Potential & Actual Evapotranspiration
01:57 What is MODIS?
02:22 MOD16 ET product
02:58 MOD16 ET algorithm
03:31 MOD16 ET accuracy
04:14 MOD16 ET global data, resolution & time series
04:37 MOD16 data products
05:52 MOD16A2GF
06:15 8-Day Composite
07:08 AppEEARS
07:22 Concluding remarks
Link to the presentation: bit.ly/3jSSXJA
Link to this RU-vid video: • Introduction to MODIS ...
Link to MOD16A2GF Version 6 Web site: lpdaac.usgs.gov/products/mod1...
Link to the AppEEARS website: lpdaacsvc.cr.usgs.gov/appeears/
Further reading:
MODIS Global Terrestrial Evapotranspiration (ET) Product (NASA MOD16A2/A3) Algorithm Theoretical Basis Document Collection 5 , Qiaozhen Mu, Maosheng Zhao, Steven W. Running (2013). Available online: lpdaac.usgs.gov/documents/93/...
Link to other videos on Water Balance of River Basins:
• Water Balance of River...
#Evapotranspiration #MODIS #MOD16

Опубликовано:

1 авг 2024

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Комментарии : 34

@Mr19751354 2 года назад

Thank you very much for your time and for providing this valuable information. I'm looking forwards to seeing the next video.

@GeosearchInternational 2 года назад

You are welcome! Video 2 on evapotranspiration is almost ready & will be uploaded soon. All the best, Andreas

@GeosearchInternational 2 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cUAtYyGI9mI.html

@AR_Safi 2 года назад

Thank you so much sir, love and respect from Afghanistan

@GeosearchInternational 2 года назад

You are welcome Eng. Niazy! Take care at this difficult time in Afghanistan & all the best, Andreas

@stanitebros 2 года назад

Thank you!

@GeosearchInternational 2 года назад

You're welcome Foster! All the best, Andreas

@geo_science 2 года назад

This information looks super exciting! I've studied increasing recharge rates resulting from groundwater intake for one river basin in Russia and acquiring pet and et data was really challenging. Looking forward to compare data from my model with the satellite data.

@GeosearchInternational 2 года назад

Hi Victor, I'm just working on the next video - hopefully will be ready next week. So far I have had excellent results using MOD16 & CHIRPS for doing a basic water balance, except near the coast where CHIRPS is less effective. Let's see how it works in Russia! All the best, Andreas

@GeosearchInternational 2 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cUAtYyGI9mI.html

@nozimteshaev4661 Год назад

thanks a lot sir!

@GeosearchInternational Год назад

Most welcome! All the best, Andreas

@muhammadmobeen8682 2 года назад

Impressive

@GeosearchInternational 2 года назад

Thanks Muhammad! All the best, Andreas

@eliasnkiaka2978 2 года назад

A useful video. I can't wait to learn how to convert MODIS16A2 8-day composites to monthly data

@GeosearchInternational 2 года назад

Thanks Elias! I'm working on the follow-up video. All the best, Andreas

@eliasnkiaka2978 2 года назад

Thanks very much for your humility. How soon can we expect the next video?

@GeosearchInternational 2 года назад

Hi Elias, I should be finished by next week though sometimes it takes RU-vid a few days to process the video as well. in All the best, Andreas

@GeosearchInternational 2 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cUAtYyGI9mI.html

@mo123296 Год назад

THANKS

@GeosearchInternational 11 месяцев назад

Welcome! All the best, Andreas

@AWRENOW 2 года назад

good video

@GeosearchInternational 2 года назад

Glad you enjoyed it! All the best, Andreas

@ik1460b 2 года назад

hello sir and thank you so much for this video, i need to work with the energy balance models (TSEB, SPARSE,SEBAL) to estimate ET for irrigation scheduling.. Now all of this is so new to me and i don't hv any clue how to do it, i've started with the basics of ET using Modis products and the Fao method, can u plz suggest any videos that explains these models as easy as u did in this video?? THANK YOU AGAIN

@GeosearchInternational 2 года назад

Hi Ikram, Sorry, I haven't used any of the models which you mentioned. From my research MODIS seems to be pretty good for what I use if for, which is river basin water balances. I assume that it would also be good for irrigation scheduling as you get frequent data, and the resolution is pretty good. I have not found any good videos on evapotranspiration, which is why I have made two videos on the subject. Mostly the good information is hidden in the manuals or scientific publications but it takes a lot of reading to find things which are actually useful. I presume that you have seen the next video in this series about how to download the MODIS data? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cUAtYyGI9mI.html Good luck with your research & all the best, Andreas

@gasparddemorcy1283 Год назад

Have-you ever tried the AquaCrop free logiciel providing really accurate irriguation agenda?

@rathnakumarv3956 Год назад

sir have you released any video using the version 6.1 data as mentioned in this video @ 5:52 min ?

@GeosearchInternational Год назад

Hi Rathna, no I'm not going to update the video. The MODIS products will be updated continuously in the future as they improve the algorithm, but the way we can download and process the data should remain the same. All the best, Andreas

@rathnakumarv3956 Год назад

@@GeosearchInternational ok sir.

@GeosearchInternational Год назад

You are welcome! All the best, Andreas

@yuvraj7473 Год назад

@GeosearchInternational, Hello sir, I have a query regarding the evapotranspiration product MOD16A2 As it is showing that the product gives Evapotranspiration (ET) and Potential Evapotranspiration Data (PET) data, what are ET and PET ?

@GeosearchInternational Год назад

PET is the potential (i.e., maximum possible) evapotranspiration, which is only possible if there is sufficient water available. ET is the actual evapotranspiration - i.e., what has really evaporated. All the best, Andreas

@yuvraj7473 Год назад

@@GeosearchInternational Thank you for the response, based on it can I say PET is reference evapotranspiration and ET is crop evapotranspiration?

@GeosearchInternational Год назад

Yes I think that is correct, as MODIS follows the Penman-Monteith method to calculate PET, which is the only one recommended by the FAO to calculate the reference evapotranspiration, ETo. As far as I understand PET is an older term which should actually be replaced by reference evapotranspiration. ET is just the actual evapotranspiration that is measured over an area. It will be crop evapotranspiration if your polygon is over a cropped area. If its over a river basin it will include all the actual ET from that area. Just be careful as ET/PET cannot be calculated from non-vegetated areas such as barren deserts and open water. Good luck & all the best, Andreas