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View Poll Results: Do you prefer my old system or this one?
This one, but I still liked the other. 2 66.67%
This one. I hated the other! 0 0%
This one, but I still hate both. 0 0%
It's a tough choice. 0 0%
The old one, but I still like this one. 0 0%
The old one. I hate this one! 0 0%
The old one, but I still hate it. 1 33.33%
Voters: 3. You may not vote on this poll

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Old 09-23-2019, 12:29 AM
 
Location: Putnam County, TN
251 posts, read 53,251 times
Reputation: 143

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First letter:
⦁ A: Coldest month above 10C/50F
⦁ B: Coldest month between 2.2C/36F and 10C/50F
⦁ C: Coldest month between -2.7C/27F and 2.2C/36F
⦁ D: Coldest month between -7.7C/18F and -2.7C/27F
⦁ E: Coldest month below -7.7C/18F
⦁ F: Warmest month below W = 9 − 0.1 C, where W is the average temperature in the warmest month and C the average of the coldest month, both in degrees Celsius.

Second letter:
⦁ A type climates:
⦁ f: At least 2.4in in every month
⦁ w: Driest month below 2.4in and more than 100-(P*25), occurs in low sun half of year (Oct-Mar north of Equator, Apr-Sep south). P = annual precipitation (mm)
⦁ W: Driest month below 2.4in and less than 100-(P*25), occurs in low sun half of year. P = annual precipitation (mm)
⦁ s: Driest month below 2.4in and more than 100-(P*25), occurs in high sun half of year. P = annual precipitation (mm)
⦁ S: Driest month below 2.4in and less than 100-(P*25), occurs in high sun half of year. P = annual precipitation (mm)
⦁ g: No more than 12.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ d: No more than 7.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ e: No more than 2.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ B-E type climates:
⦁ w: Wettest high sun month more than 10 times wetter than driest low sun month
⦁ s: Wettest low sun month more than 3 times wetter than driest high sun month, driest high sun month equal to or below 1.19in
⦁ g: No more than 12.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius. Not included in subpolar climates.
⦁ d: No more than 7.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ e: No more than 2.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ f: No above criteria met
⦁ F type climates:
⦁ w: Wettest high sun month more than 10 times wetter than driest low sun month
⦁ s: Wettest low sun month more than 3 times wetter than driest high sun month, driest high sun month equal to or below 30mm/1.18in
⦁ d: No more than 2.5 times its precipitation threshold. The precipitation threshold (mm) is twice its mean annual temperature in degrees Celsius.
⦁ f: No above criteria met

Third letter:
⦁ A type climates:
⦁ a: Hottest month above 30C/86F, coolest month above 17.7C/64F
⦁ b: Hottest month below 30C/86F, coolest month above 17.7C/64F
⦁ c: Hottest month above 30C/86F, coolest month between 10C/50F and 17.7C/64F
⦁ d: Hottest month between 22.2C/72F and 30C/86F, coolest month between 10C/50F and 17.7C/64F
⦁ e: Warmest month below 22.2C/72F, coolest month between 10C/50F and 17.7C/64F
⦁ B type climates:
⦁ a: Hottest month above 28.8C/84F, coldest month between 6.1C/43F and 10C/50F, more than 3 months above 10C
⦁ b: Hottest month between 22.2C/72F and 28.8C/84F, coldest month between 6.1C/43F and 10C/50F, more than 3 months above 10C
⦁ c: Hottest month above 28.8C/84F, coldest month between 2.2C/36F and 6.1C/43F, more than 3 months above 10C/50F
⦁ d: Hottest month between 22.2C/72F and 28.8C/84F, coldest month between 2.2C/36F and 6.1C/43F, more than 3 months above 10C/50F
⦁ e: Warmest month between 10C/50F and 22.2C/72F, coldest month between 6.1C/43F and 10C/50F, more than 3 months above 10C/50F
⦁ f: Warmest month between 10C/50F and 22.2C/72F, coldest month between 2.2C/36F and 6.1C/43F, more than 3 months above 10C/50F
⦁ g: Less than 4 months above 10C/50F
⦁ C type climates:
⦁ a: Hottest month above 27.7C/82F, more than 3 months above 10C/50F
⦁ b: Hottest month between 22.2C/72F and 27.7C/82F, more than 3 months above 10C/50F
⦁ c: Warmest month below 22.2C/72F, more than 3 months above 10C/50F
⦁ d: Less than 4 months above 10C/50F
⦁ D type climates:
⦁ a: Hottest month above 26.6C/80F, more than 3 months above 10C/50F
⦁ b: Hottest month between 22.2C/72F and 26.6C/80F, more than 3 months above 10C/50F
⦁ c: Warmest month between 10C/50F and 22.2C/72F, more than 3 months above 10C/50F
⦁ d: Less than 4 months above 10C/50F
⦁ E type climates:
⦁ a: Hottest month above 26.6C/80F, more than 3 months above 10C/50F
⦁ b: Hottest month between 22.2C/72F and 26.6C/80F, more than 3 months above 10C/50F
⦁ c: Hottest month between 10C/50F and 22.2C/72F, more than 3 months above 10C/50F
⦁ d: Coldest month between -35C/-31F and -7.7C/18F, less than 4 months above 10C/50F
⦁ e: Warmest month above 18.8C/66F, coldest month below -35C/-31F, less than 4 months above 10C/50F
⦁ f: Warmest month between 10C/50F and 18.8C/66F, coldest month below -35C/-31F, less than 4 months above 10C/50F
⦁ F type climates:
⦁ a: Every month above 0C/32F
⦁ b: Warmest month above 0C/32F, coldest month between -35C/-31F and 0C/32F
⦁ c: Warmest month above 0C/32F, coldest month below -35C/-31F
⦁ d: Warmest month below 0C/32F, coldest month between -35C/-31F and 0C/32F
⦁ e: Warmest month below 0C/32F, coldest month below -35C/-31F

Names of climates for every combination of letters in this spoiler:
Spoiler
Tropical climates have average temperatures of at least 50 degrees Fahrenheit in every month.
1. Afa: Hypertropical rainforest climates.
2. Awa: Hypertropical monsoon climates.
3. AWa: Hypertropical monsoon savanna climates.
4. Asa: Hypertropical mediterranean climates.
5. ASa: Hypertropical mediterranean savanna climates.
6. Aga: Hypertropical steppe climates.
7. Ada: Hypertropical semi-desert climates.
8. Aea: Hypertropical extreme desert climates.
9. Afb: Moderate tropical rainforest climates.
10. Awb: Moderate tropical monsoon climates.
11. AWb: Moderate tropical monsoon savanna climates.
12. Asb: Moderate tropical mediterranean climates.
13. ASb: Moderate tropical mediterranean savanna climates.
14. Agb: Moderate tropical steppe climates.
15. Adb: Moderate tropical semi-desert climates.
16. Aeb: Moderate tropical extreme desert climates.
17. Afc: Hot tropical transitional rainforest climates.
18. Awc: Hot tropical transitional monsoon climates.
19. AWc: Hot tropical transitional monsoon savanna climates.
20. Asc: Hot tropical transitional mediterranean climates.
21. ASc: Hot tropical transitional mediterranean savanna climates.
22. Agc: Hot tropical transitional steppe climates.
23. Adc: Hot tropical transitional semi-desert climates.
24. Aec: Hot tropical transitional extreme desert climates.
25. Afd: Moderate tropical transitional rainforest climates.
26. Awd: Moderate tropical transitional monsoon climates.
27. AWd: Moderate tropical transitional monsoon savanna climates.
28. Asd: Moderate tropical transitional mediterranean climates.
29. ASd: Moderate tropical transitional mediterranean savanna climates.
30. Agd: Moderate tropical transitional steppe climates.
31. Add: Moderate tropical transitional semi-desert climates.
32. Aed: Moderate tropical transitional extreme desert climates.
33. Afe: Mild-summer tropical transitional rainforest climates.
34. Awe: Mild-summer tropical transitional monsoon climates.
35. AWe: Mild-summer tropical transitional monsoon savanna climates.
36. Ase: Mild-summer tropical transitional mediterranean climates.
37. ASe: Mild-summer tropical transitional mediterranean savanna climates.
38. Age: Mild-summer tropical transitional steppe climates.
39. Ade: Mild-summer tropical transitional semi-desert climates.
40. Aee: Mild-summer tropical transitional extreme desert climates.
41. ECOLOGICAL NOTE: All tropical climates are warm enough to permit tree growth year-round, and non-transitional tropical climates are generally frost-free for long periods of time.

Subtropical and Mild Temperate climates have average temperatures below 50F in at least one month but 36F or above in every month.
1. Bfa: Hot humid subtropical climates.
2. Bwa: Hot subtropical monsoon climates.
3. Bsa: Hot subtropical mediterranean climates.
4. Bga: Hot subtropical steppe climates.
5. Bda: Hot subtropical semi-desert climates.
6. Bea: Hot subtropical extreme desert climates.
7. Bfb: Lower humid subtropical climates.
8. Bwb: Lower subtropical monsoon climates.
9. Bsb: Lower subtropical mediterranean climates.
10. Bgb: Lower subtropical steppe climates.
11. Bdb: Lower subtropical semi-desert climates.
12. Beb: Lower subtropical extreme desert climates.
13. Bfc: Semi-continental humid subtropical climates.
14. Bwc: Semi-continental subtropical monsoon climates.
15. Bsc: Semi-continental subtropical mediterranean climates.
16. Bgc: Semi-continental subtropical steppe climates.
17. Bdc: Semi-continental subtropical semi-desert climates.
18. Bec: Semi-continental subtropical extreme desert climates.
19. Bfd: Upper humid subtropical climates.
20. Bwd: Upper subtropical monsoon climates.
21. Bsd: Upper subtropical mediterranean climates.
22. Bgd: Upper subtropical steppe climates.
23. Bdd: Upper subtropical semi-desert climates.
24. Bed: Upper subtropical extreme desert climates.
25. Bfe: Humid subtropical maritime climates.
26. Bwe: Subtropical maritime monsoon climates.
27. Bse: Subtropical maritime mediterranean climates.
28. Bge: Subtropical maritime steppe climates.
29. Bde: Subtropical maritime semi-desert climates.
30. Bee: Subtropical maritime extreme desert climates.
31. Bff: Humid temperate maritime climates.
32. Bwf: Temperate maritime monsoon climates.
33. Bsf: Temperate maritime mediterranean climates.
34. Bgf: Temperate maritime steppe climates.
35. Bdf: Temperate maritime semi-desert climates.
36. Bef: Temperate maritime extreme desert climates.
37. Bfg: Humid subpolar oceanic climates.
38. Bwg: Subpolar oceanic monsoon climates.
39. Bsg: Subpolar oceanic mediterranean climates.
40. Bdg: Subpolar oceanic semi-desert climates.
41. Beg: Subpolar oceanic extreme desert climates.
42. ECOLOGICAL NOTE: These areas are almost always warm enough in the winter that the hardiest palm species' seedlings can survive long enough to reproduce in their preferred summer conditions.

In temperate transitional climates, temperatures in the coldest month are less than 36F but greater than 27F.
1. Cfa: Humid hot temperate transitional climates.
2. Cwa: Hot temperate transitional monsoon climates.
3. Csa: Hot temperate transitional mediterranean climates.
4. Cga: Hot temperate transitional steppe climates.
5. Cda: Hot temperate transitional semi-desert climates.
6. Cea: Hot temperate transitional extreme desert climates.
7. Cfb: Humid warm temperate transitional climates.
8. Cwb: Warm temperate transitional monsoon climates.
9. Csb: Warm temperate transitional mediterranean climates.
10. Cgb: Warm temperate transitional steppe climates.
11. Cdb: Warm temperate transitional semi-desert climates.
12. Ceb: Warm temperate transitional extreme desert climates.
13. Cfc: Humid cold-winter maritime climates.
14. Cwc: Cold-winter maritime monsoon climates.
15. Csc: Cold-winter maritime mediterranean climates.
16. Cgc: Cold-winter maritime steppe climates.
17. Cdc: Cold-winter maritime semi-desert climates.
18. Cec: Cold-winter maritime extreme desert climates.
19. Cfd: Humid moderate subpolar climates.
20. Cwd: Moderate subpolar monsoon climates.
21. Csd: Moderate subpolar mediterranean climates.
22. Cdd: Moderate subpolar semi-desert climates.
23. Ced: Moderate subpolar extreme desert climates.
24. ECOLOGICAL NOTE: These areas are almost never warm enough in the winter for palm seedlings to survive long enough to reproduce, but the adults may survive, and the winters rarely see continuous snowpack.

In moderate continental climates, temperatures in the coldest month are at least 18F but less than 27F.
1. Dfa: Humid hot continental climates.
2. Dwa: Hot continental monsoon climates.
3. Dsa: Hot continental mediterranean climates.
4. Dga: Hot continental steppe climates.
5. Dda: Hot continental semi-desert climates.
6. Dea: Hot continental extreme desert climates.
7. Dfb: Humid warm continental climates.
8. Dwb: Warm continental monsoon climates.
9. Dsb: Warm continental mediterranean climates.
10. Dgb: Warm continental steppe climates.
11. Ddb: Warm continental semi-desert climates.
12. Deb: Warm continental extreme desert climates.
13. Dfc: Humid moderate hemiboreal climates.
14. Dwc: Moderate hemiboreal monsoon climates.
15. Dsc: Moderate hemiboreal mediterranean climates.
16. Dgc: Moderate hemiboreal steppe climates.
17. Ddc: Moderate hemiboreal semi-desert climates.
18. Dec: Moderate hemiboreal extreme desert climates.
19. Dfd: Humid moderate continental subpolar climates.
20. Dwd: Moderate continental subpolar monsoon climates.
21. Dsd: Moderate continental subpolar mediterranean climates.
22. Ddd: Moderate continental subpolar semi-desert climates.
23. Ded: Moderate continental subpolar extreme desert climates.
24. ECOLOGICAL NOTE: Snowpack is usually present in moderate continental climates, but an unusually warm winter may result in transient snow cover instead.

In harsh climates, the coldest month averages 18F or less.
1. Efa: Humid warm hypercontinental climates.
2. Ewa: Warm hypercontinental monsoon climates.
3. Esa: Warm hypercontinental mediterranean climates.
4. Ega: Warm hypercontinental steppe climates.
5. Eda: Warm hypercontinental semi-desert climates.
6. Eea: Warm hypercontinental extreme desert climates.
7. Efb: Humid warm temperate harsh climates.
8. Ewb: Warm temperate harsh monsoon climates.
9. Esb: Warm temperate harsh mediterranean climates.
10. Egb: Warm temperate harsh steppe climates.
11. Edb: Warm temperate harsh semi-desert climates.
12. Eeb: Warm temperate harsh extreme desert climates.
13. Efc: Humid harsh hemiboreal climates.
14. Ewc: Harsh hemiboreal monsoon climates.
15. Esc: Harsh hemiboreal mediterranean climates.
16. Egc: Harsh hemiboreal steppe climates.
17. Edc: Harsh hemiboreal semi-desert climates.
18. Eec: Harsh hemiboreal extreme desert climates.
19. Efd: Humid continental subpolar climates.
20. Ewd: Continental subpolar monsoon climates.
21. Esd: Continental subpolar mediterranean climates.
22. Edd: Continental subpolar semi-desert climates.
23. Eed: Continental subpolar extreme desert climates.
24. Efe: Humid hypercontinental subpolar climates.
25. Ewe: Hypercontinental subpolar monsoon climates.
26. Ese: Hypercontinental subpolar mediterranean climates.
27. Ede: Hypercontinental subpolar semi-desert climates.
28. Eee: Hypercontinental subpolar extreme desert climates.
29. Eff: Humid cold subpolar climates.
30. Ewf: Cold subpolar monsoon climates.
31. Esf: Cold subpolar mediterranean climates.
32. Edf: Cold subpolar semi-desert climates.
33. Eef: Cold subpolar extreme desert climates.
34. ECOLOGICAL NOTE: Harsh climates almost always have cold enough winters for snowpack lasting months. In all but borderline harsh climates, warmer winters will often actually increase snowfall, not decrease it.

In polar climates, every month averages below W = 9 − 0.1 C, where W is the average temperature in the warmest month and C the average of the coldest month, both in degrees Celsius.
1. Ffa: Humid mild tundra climates.
2. Fwa: Mild tundra monsoon climates.
3. Fsa: Mild tundra mediterranean climates.
4. Fda: Mild polar desert climates.
5. Ffb: Humid harsh tundra climates.
6. Fwb: Harsh tundra monsoon climates.
7. Fsb: Harsh tundra mediterranean climates.
8. Fdb: Harsh polar desert climates.
9. Ffc: Humid super-tundra climates.
10. Fwc: Super-tundra monsoon climates.
11. Fsc: Super-tundra mediterranean climates.
12. Fdc: Super-harsh polar desert climates.
13. Ffd: Moderate glacier climates.
14. Fdd: Frozen polar desert climates.
15. Ffe: Super-glacier climates.
16. Fde: Super-frozen polar desert climates.
17. ECOLOGICAL NOTE: Polar climates are, except in some warmer mild tundra climates, extremely hostile to all woody vegetation. Therefore, most such areas are either grassy or barren regardless of precipitation.

P.S.: The old system is here. It was an all-around terrible, underdone system, so I've renamed a few classifications, added formulas for certain letters and changed my ww/ss to W/S.

EDIT: I just realized that you would need 176 different colors to make a world climate atlas using this system! (Assuming you ignore the fact that a few classifications probably don't exist at the moment.)

Last edited by Sun Belt-lover L.A.M.; 09-23-2019 at 01:21 AM..
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Old 09-24-2019, 06:49 PM
 
Location: Putnam County, TN
251 posts, read 53,251 times
Reputation: 143
Which system is better to you: this or the old one?
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Old 10-10-2019, 12:36 PM
 
194 posts, read 47,012 times
Reputation: 98
In practice, application becomes difficult.
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Old 10-10-2019, 12:57 PM
tij
 
Location: Providence, RI
375 posts, read 83,544 times
Reputation: 196
Feel a climatic system should be broader, focusing on macroscale patterns, which is what koppen tried to achieve, instead of narrow temperature thresholds

Oceanic to Med to desert to tropical wet and dry/monsoonal to tropical rainforest on west coasts

humid continental to humid subtropical to tropical on east coasts

Instead of zone C, why not a transitional denotation? something between humid continental and warm-temperate/mesothermal zones
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Old Today, 04:23 PM
 
Location: Putnam County, TN
251 posts, read 53,251 times
Reputation: 143
Quote:
Originally Posted by tij View Post
Instead of zone C, why not a transitional denotation? something between humid continental and warm-temperate/mesothermal zones
Good question! The reason I added an entire category for temperate transitional is because I didn't want them associated with either continental or subtropical/mild temperate climates.

Sorry I didn't respond sooner.
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