COMPUTER-BASED REPRESENTATION OF PRECIPITATION

• US 20170017014A1
• Filed: 07/13/2015
• Published: 01/19/2017
• Est. Priority Date: 07/13/2015
• Status: Active Grant

• Current Assignee: Climate LLC (Bayer AG)
• Original Assignee: The Climate Corporation (Bayer AG)
• Inventors: Kleeman, Alex, Small, Todd
• Granted Patent: US 10,545,263 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01W 1/10 Devices for predicting weather conditions computers per se G06; display devices G09

Abstract

A method for estimating precipitation values and associated uncertainties is provided. In an embodiment, precipitation records that indicate the occurrence and intensity of precipitation at specific locations are received by a weather computing system. The weather computing system uses the gauge information to separately create multiple realizations of precipitation occurrence fields and precipitation intensity fields. The weather computing system may model the occurrence of precipitation by proposing a value for each point independently and using the proposed value to update all prior proposals. The weather computing system may model the intensity of precipitation by modeling the spatial correlation of precipitation intensity and sampling from distributions at each location to determine the intensity of precipitation at each location. The weather computing system may then combine the precipitation intensity and occurrence fields into one or more final estimate fields.

Claims

1. A method comprising:

receiving, over a computer network, one or more digital precipitation records comprising a plurality of digital data values representing an occurrence of precipitation at a first plurality of locations and an intensity of precipitation at the first plurality of locations;

using digitally programmed logic in an occurrence estimation module of a digital electronic weather computer, creating and storing in a precipitation database one or more precipitation occurrence fields by;

repeating the following steps for each location of a second plurality of locations for each of any number of iterations;

a) selecting a particular location of the second plurality of locations;

b) creating a probabilistic estimate of the occurrence of precipitation at the particular location based on the occurrences of precipitation at the first plurality of locations and one or more probabilistic estimates describing the occurrence of precipitation at one or more other locations of the second plurality of locations;

c) updating the one or more probabilistic estimates of the occurrence of precipitation at the one or more other locations of the second plurality of locations based on the probabilistic estimate of the occurrence of precipitation at the particular location;

determining whether, during a particular iteration, one or more values changed by more than a threshold value;

in response to determining that one or more values changed by more than the threshold value, performing a next iteration;

in response to determining that the one or more values did not change by more that the threshold value, aggregating the probabilistic estimates of the occurrence of precipitation at the second plurality of locations into the one or more precipitation occurrence fields;

using digitally programmed logic in an intensity estimation module of the weather computer, creating and storing in the precipitation database one or more precipitation intensity fields by;

for each location of the second plurality of locations;

creating and storing one or more data values that describe relationships between an intensity of precipitation at the location and an intensity of precipitation at one or more other locations of the second plurality of locations;

creating and storing one or more distributions of the intensity of precipitation at the location, including digitally constraining the distributions by the intensity of precipitation at the one or more other locations of the second plurality of locations and/or the data values representing the intensity of precipitation at the first plurality of locations;

extracting one or more data values representing probabilistic estimates for intensity based on the one or more data values that describe relationships and the one or more distributions of the intensity of precipitation at the location;

aggregating the extracted one or more data values into the one or more precipitation intensity fields;

using digitally programmed logic in a climate estimating module, creating and digitally storing final estimates for precipitation occurrence and intensity at one or more locations of the second plurality of locations based on the one or more precipitation occurrence fields and the one or more precipitation intensity fields.

2. The method of claim 1 wherein creating and storing the one or more precipitation occurrence fields further comprises:

creating, in digital memory of the weather computer, a coarse grid representing the occurrence of precipitation at generalized locations of the second plurality of locations;

using the occurrence estimating module, creating the probabilistic estimates of the occurrence of precipitation at each of the second plurality of locations based, at least in part, on estimated occurrences from one or more of the generalized locations represented by the coarse grid.

3. The method of claim 1 further comprising generating and storing one or more agronomic models in digital memory of the weather computer based at least in part on the final estimates for precipitation occurrence and intensity.

4. The method of claim 3 wherein the final estimates for precipitation occurrence and intensity include one or more estimates of uncertainty, the method further comprising modifying the agronomic models and storing modified agronomic models in the digital memory by propagating the one or more estimates of uncertainty into the one or more agronomic models.

5. The method of claim 1 further comprising:

creating one or more elevation dependent variables in digital memory of the weather computer;

wherein the occurrence estimation module factors in the one or more elevation dependent variables in creating the one or more precipitation occurrence fields;

wherein the intensity estimation module factors in the one or more elevation dependent variables in creating the one or more precipitation intensity fields.

6. The method of claim 1 wherein extracting one or more data values representing probabilistic estimates for intensity comprises:

sampling values from the one or more distributions of the intensity of precipitation at each of the locations for one or more parameters;

computing one or more likely intensities for each of the locations of the second plurality of locations based on the one or more parameters and on one or more covariates.

7. The method of claim 6 wherein the one or more covariates include latitude, longitude, and altitude.

8. The method of claim 6 wherein computing the one or more likely intensities comprises:

creating one or more covariance matrices that includes distances of each of the second plurality of locations to each of the first plurality of locations;

applying a tapering function to the one or more covariance matrices to create one or more computationally efficient covariance matrices;

calculating the one or more likely intensities using the one or more computationally efficient covariance matrices.

9. The method of claim 1 further comprising digitally augmenting the one or more precipitation intensity fields using the one or more precipitation occurrence fields.

10. The method of claim 1 further comprising:

using digitally programmed logic in a weather forecast module, generating and displaying one or more weather forecasts based, at least in part, on the final estimates for precipitation occurrence and intensity.

11. One or more non-transitory computer readable media storing instructions which, when executed by one or more computing devices, cause performance of:

receiving, over a computer network, one or more digital precipitation records comprising a plurality of digital data values representing an occurrence of precipitation at a first plurality of locations and an intensity of precipitation at the first plurality of locations;

using digitally programmed logic in an occurrence estimation module of a digital electronic weather computer, creating and storing in a precipitation database one or more precipitation occurrence fields by;

repeating the following steps for each location of a second plurality of locations for each of any number of iterations;

a) selecting a particular location of the second plurality of locations;

b) creating a probabilistic estimate of the occurrence of precipitation at the particular location based on the occurrences of precipitation at the first plurality of locations and one or more probabilistic estimates describing the occurrence of precipitation at one or more other locations of the second plurality of locations;

c) updating the one or more probabilistic estimates of the occurrence of precipitation at the first plurality of locations and at the one or more other locations of the second plurality of locations based on the probabilistic estimate of the occurrence of precipitation at the particular location;

determining whether, during a particular iteration, one or more values changed by more than a threshold value;

in response to determining that one or more values changed by more than the threshold value, performing a next iteration;

in response to determining that the one or more values did not change by more that the threshold value, aggregating the probabilistic estimates of the occurrence of precipitation at the second plurality of locations into the one or more precipitation occurrence fields;

using digitally programmed logic in an intensity estimation module of the weather computer, creating and storing in the precipitation database one or more precipitation intensity fields by;

for each location of the second plurality of locations;

creating and storing one or more data values that describe relationships between an intensity of precipitation at the location and an intensity of precipitation at one or more other locations of the second plurality of locations;

creating and storing one or more distributions of the intensity of precipitation at the location, including digitally constraining the distributions by the intensity of precipitation at the one or more other locations of the second plurality of locations and/or the data values representing the intensity of precipitation at the first plurality of locations;

extracting one or more data values representing probabilistic estimates for intensity based on the one or more data values that describe relationships and the one or more distributions of the intensity of precipitation at the location;

aggregating the extracted one or more data values into the one or more precipitation intensity fields;

using digitally programmed logic in a climate estimating module, creating and digitally storing final estimates for precipitation occurrence and intensity at one or more locations of the second plurality of locations based on the one or more precipitation occurrence fields and the one or more precipitation intensity fields.

12. The one or more non-transitory computer readable media of claim 11 wherein creating and storing the one or more precipitation occurrence fields further comprises:

creating, in digital memory of the weather computer, a coarse grid representing the occurrence of precipitation at generalized locations of the second plurality of locations;

using the occurrence estimating module, creating the probabilistic estimates of the occurrence of precipitation at each of the second plurality of locations based, at least in part, on estimated occurrences from one or more of the generalized locations represented by the coarse grid.

13. The one or more non-transitory computer readable media of claim 11 further comprising generating and storing one or more agronomic models in digital memory of the weather computer based at least in part on the final estimates for precipitation occurrence and intensity.

14. The one or more non-transitory computer readable media of claim 13 wherein the final estimates for precipitation occurrence and intensity include one or more estimates of uncertainty, wherein the instruction, when executed by the one or more computing devices, further cause modifying the agronomic models and storing modified agronomic models in the digital memory by propagating the one or more estimates of uncertainty into the one or more agronomic models.

15. The one or more non-transitory computer readable media of claim 11, further comprising:

creating one or more elevation dependent variables in digital memory of the weather computer;

wherein the occurrence estimation module factors in the one or more elevation dependent variables in creating the one or more precipitation occurrence fields;

wherein the intensity estimation module factors in the one or more elevation dependent variables in creating the one or more precipitation intensity fields.

16. The one or more non-transitory computer readable media of claim 11 wherein extracting one or more data values representing probabilistic estimates for intensity comprises:

sampling values from the one or more distributions of the intensity of precipitation at each of the locations for one or more parameters;

computing one or more likely intensities for each of the locations of the second plurality of locations based on the one or more parameters and on one or more covariates.

17. The one or more non-transitory computer readable media of claim 16 wherein the one or more covariates include latitude, longitude, and elevation.

18. The one or more non-transitory computer readable media of claim 16 wherein computing the one or more likely intensities comprises:

creating one or more covariance matrices that includes distances of each of the second plurality of locations to each of the first plurality of locations;

applying a tapering function to the one or more covariance matrices to create one or more computationally efficient covariance matrices;

calculating the one or more likely intensities using the one or more computationally efficient covariance matrices.

19. The one or more non-transitory computer readable media of claim 16 further comprising digitally augmenting the one or more precipitation intensity fields using the one or more precipitation occurrence fields.

20. The one or more non-transitory computer readable media of claim 16 further comprising:

using digitally programmed logic in a weather forecast module, generating and displaying one or more weather forecasts based, at least in part, on the final estimates for precipitation occurrence and intensity.

21. A weather computing system comprising:

a communication component, configured to receive, over a computer network, one or more digital precipitation records comprising a plurality of digital data values representing an occurrence of precipitation at a first plurality of locations and an intensity of precipitation at the first plurality of locations;

an occurrence estimation module, configured to use digitally programmed logic to create and store in a precipitation database one or more precipitation occurrence fields by;

repeating the following steps for each location of a second plurality of locations for each of any number of iterations;

a) selecting a particular location of the second plurality of locations;

b) creating a probabilistic estimate of the occurrence of precipitation at the particular location based on the occurrences of precipitation at the first plurality of locations and one or more probabilistic estimates describing the occurrence of precipitation at one or more other locations of the second plurality of locations;

c) updating the one or more probabilistic estimates of the occurrence of precipitation at the first plurality of locations and at the one or more other locations of the second plurality of locations based on the probabilistic estimate of the occurrence of precipitation at the particular location;

determining whether, during a particular iteration, one or more values changed by more than a threshold value;

in response to determining that one or more values changed by more than the threshold value, performing a next iteration;

in response to determining that the one or more values did not change by more that the threshold value, aggregating the probabilistic estimates of the occurrence of precipitation at the second plurality of locations into the one or more precipitation occurrence fields;

an intensity estimation module, configured to use digitally programmed logic to create and store in the precipitation database one or more precipitation intensity fields by;

for each location of the second plurality of locations;

creating and storing one or more data values that describe relationships between an intensity of precipitation at the location and an intensity of precipitation at one or more other locations of the second plurality of locations;

creating and storing one or more distributions of the intensity of precipitation at the location, including digitally constraining the distributions by the intensity of precipitation at the one or more other locations of the second plurality of locations and/or the data values representing the intensity of precipitation at the first plurality of locations;

extracting one or more data values representing probabilistic estimates for intensity based on the one or more data values that describe relationships and the one or more distributions of the intensity of precipitation at the location;

aggregating the extracted one or more data values into the one or more precipitation intensity fields;

a climate estimation module, configured to use digitally programmed logic to create and digitally store final estimates for precipitation occurrence and intensity at one or more locations of the second plurality of locations based on the one or more precipitation occurrence fields and the one or more precipitation intensity fields.

22. The weather computing system of claim 21 wherein the precipitation occurrence module is further configured to create and store the one or more precipitation occurrence fields by:

creating, in digital memory of the weather computing device, a coarse grid representing the occurrence of precipitation at generalized locations of the second plurality of locations;

using the occurrence estimating module, creating the probabilistic estimates of the occurrence of precipitation at each of the second plurality of locations based, at least in part, on estimated occurrences from one or more of the generalized locations represented by the coarse grid.

23. The weather computing system of claim 21 further comprising an agronomic model module, configured to use digitally programmed logic to generate and store one or more agronomic models in digital memory of the weather computing device based at least in part on the final estimates for precipitation occurrence and intensity.

24. The weather computing device of claim 23 wherein the final estimates for precipitation occurrence and intensity include one or more estimates of uncertainty;

wherein the agronomic model module is further configured to modify the agronomic models by propagating the one or more estimates of uncertainty into the one or more agronomic models and store modified agronomic models in the digital memory.

25. The weather computing system of claim 21:

wherein the occurrence estimation module is further configured create the one or more precipitation occurrence fields based at least in part on one or more elevation dependent variables;

wherein the intensity estimation module is further configured to create the one or more precipitation intensity fields based at least in part on one or more elevation dependent variables.

26. The weather computing system of claim 21

wherein the intensity estimation module is further configured to extract the one or more data values representing probabilistic estimates for intensity by:

sampling values from the one or more distributions of the intensity of precipitation at each of the locations for one or more parameters;

computing one or more likely intensities for each of the locations of the second plurality of locations based on the one or more parameters and on one or more covariates.

27. The weather computing system of claim 26 wherein the one or more covariates include latitude, longitude, and elevation.

28. The weather computing system of claim 26 wherein the intensity estimation module is further configured to compute the one or more likely intensities by:

creating one or more covariance matrices that includes distances of each of the second plurality of locations to each of the first plurality of locations;

applying a tapering function to the one or more covariance matrices to create one or more computationally efficient covariance matrices;

calculating the one or more likely intensities using the one or more computationally efficient covariance matrices.

29. The weather computing system of claim 26 wherein the intensity estimation module is further configured to digitally augment the one or more precipitation intensity fields using the one or more precipitation occurrence fields.

30. The weather computing system of claim 26 further comprising:

a weather forecast module, configured to use digitally programmed logic to generate and display one or more weather forecasts based, at least in part, on the final estimates for precipitation occurrence and intensity.