Chronology file name : MEX125.CRN Measurement file name : MEX125.RWL Date checked : 04DEC25 Checked by : NOAA-Paleoclimatology Beginning year : 1912 Ending year : 2014 Principal investigators: Kaib Bradley Site name : Niños Heroes Site location : Mexico Species information : PIO Latitude : 0M 16 Longitude : 25 -94 Elevation : 868. Series intercorrelation: 0.409 Avg mean sensitivity : 0.318 Avg standard deviation : 1.064 Avg autocorrelation : 0.709 Number dated series : 42 Segment length tested : 50 Number problem segments: 19 Pct problem segments : 25.68 PART 5: CORRELATION OF SERIES BY SEGMENTS: mex125 12:51 Thu 04 Dec 2025 Page 5 ------------------------------------------------------------------------------------------------------------------------------------ Correlations of 50-year dated segments, lagged 25 years Flags: A = correlation under .3281 but highest as dated; B = correlation higher at other than dated position Seq Series Time_span 1900 1925 1950 1975 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 NIH01B 1970 2014 .33 2 NIH05A 1950 2014 .36 .41 3 NIH05B 1950 2014 .37 .42 4 NIH04A 1950 2013 .29A .39 5 NIH04B 1950 2014 .22A .29A 6 NIH06A 1928 2014 .59 .67 .64 7 NIH06B 1928 2014 .57 .61 .62 8 NIH07A 1960 2014 .45 .44 9 NIH07B 1960 2013 .44 .55 10 NIH08A 1988 2014 .77 11 NIH08B 1988 2014 .60 12 NIH10A 1955 2014 .46 .47 13 NIH10B 1955 2014 .42 .39 14 NIH11A 1960 2013 .45 .39 15 NIH11B 1960 2013 .43 .35 16 NIH12A 1960 2014 .34 .48 17 NIH12B 1950 2014 .41 .49 18 NIH13A 1950 2013 .40 .34 19 NIH13B 1950 2014 .32A .38 20 NIH14A 1990 2013 .45 21 NIH14B 1990 2014 .10B 22 NIH15A 1950 2014 .52 .62 23 NIH15B 1960 2014 .54 .54 24 NIH18A 1980 2014 .25A 25 NIH18B 1980 2014 .26A 26 NIH21A 1950 2014 .30A .49 27 NIH21B 1930 2014 .21B .32A .49 28 NIH23A 1970 2014 .36 29 NIH23B 1970 2014 .41 30 NIH26A 1972 2014 .36 31 NIH26B 1972 2014 .51 32 NIH27A 1922 2014 .26B .29A .22B .29A 33 NIH27B 1922 2014 .35 .39 .42 .41 34 NIH31A 1980 2013 .50 35 NIH31B 1980 2013 .31A 36 NIH33A 1968 2014 .27A 37 NIH33B 1968 2014 .17B 38 NIH36A 1970 2014 .28A 39 NIH36B 1970 2014 .20A 40 NIH37A 1912 1980 .61 .45 .39 41 NIH37B 1912 1969 .61 .57 42 NIH46A 1970 2014 .49 Av segment correlation .46 .44 .39 .44 PART 7: DESCRIPTIVE STATISTICS: mex125 12:51 Thu 04 Dec 2025 Page 6 ------------------------------------------------------------------------------------------------------------------------------------ Corr //-------- Unfiltered --------\\ //---- Filtered -----\\ No. No. No. with Mean Max Std Auto Mean Max Std Auto AR Seq Series Interval Years Segmt Flags Master msmt msmt dev corr sens value dev corr () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 NIH01B 1970 2014 45 1 0 .333 .79 1.56 .332 .499 .343 2.86 .614 -.031 1 2 NIH05A 1950 2014 65 2 0 .316 1.08 2.50 .447 .478 .325 2.59 .420 -.036 1 3 NIH05B 1950 2014 65 2 0 .355 1.08 2.46 .460 .539 .338 2.44 .338 -.065 2 4 NIH04A 1950 2013 64 2 1 .376 1.88 5.01 1.104 .746 .307 2.70 .530 -.053 1 5 NIH04B 1950 2014 65 2 2 .251 1.84 4.96 1.044 .748 .305 2.70 .538 -.033 1 6 NIH06A 1928 2014 87 3 0 .632 1.54 8.14 1.368 .818 .353 2.60 .488 -.010 1 7 NIH06B 1928 2014 87 3 0 .604 1.54 8.16 1.350 .818 .355 2.60 .442 -.027 1 8 NIH07A 1960 2014 55 2 0 .437 1.88 7.29 1.713 .930 .326 2.65 .511 -.082 1 9 NIH07B 1960 2013 54 2 0 .539 1.97 7.54 1.795 .920 .343 2.70 .521 -.019 1 10 NIH08A 1988 2014 27 1 0 .766 2.69 5.05 .947 .440 .241 2.85 .549 .023 1 11 NIH08B 1988 2014 27 1 0 .595 2.60 4.97 .987 .543 .280 2.88 .605 -.028 1 12 NIH10A 1955 2014 60 2 0 .416 2.17 5.58 1.058 .573 .372 2.78 .536 -.103 2 13 NIH10B 1955 2014 60 2 0 .372 2.21 5.30 1.000 .565 .363 2.47 .478 -.095 3 14 NIH11A 1960 2013 54 2 0 .397 1.98 3.94 .951 .557 .418 2.61 .535 .005 1 15 NIH11B 1960 2013 54 2 0 .363 1.74 3.97 .868 .561 .385 2.77 .507 .035 1 16 NIH12A 1960 2014 55 2 0 .395 1.95 5.07 1.423 .847 .312 2.68 .520 -.105 1 17 NIH12B 1950 2014 65 2 0 .469 1.88 5.52 1.430 .856 .344 2.61 .477 -.100 1 18 NIH13A 1950 2013 64 2 0 .361 1.27 5.93 1.109 .864 .333 2.64 .553 .119 1 19 NIH13B 1950 2014 65 2 1 .405 1.38 6.08 1.278 .809 .357 2.56 .487 .015 1 20 NIH14A 1990 2013 24 1 0 .452 4.07 7.22 1.248 .479 .248 2.84 .717 -.140 1 21 NIH14B 1990 2014 25 1 1 .096 2.30 6.94 1.962 .693 .499 2.49 .480 .011 1 22 NIH15A 1950 2014 65 2 0 .564 1.58 8.73 1.530 .810 .353 2.66 .485 -.013 1 23 NIH15B 1960 2014 55 2 0 .540 1.74 8.76 1.627 .791 .388 2.42 .461 -.047 1 24 NIH18A 1980 2014 35 1 1 .245 3.38 5.34 .903 .623 .169 2.65 .555 .027 1 25 NIH18B 1980 2014 35 1 1 .260 3.27 5.41 .891 .604 .192 2.69 .579 .061 1 26 NIH21A 1950 2014 65 2 1 .445 .99 2.62 .515 .767 .291 2.56 .469 .085 1 27 NIH21B 1930 2014 85 3 2 .340 1.30 3.44 .736 .773 .302 2.62 .546 .014 1 28 NIH23A 1970 2014 45 1 0 .362 2.18 4.83 .958 .618 .275 2.74 .557 -.151 1 29 NIH23B 1970 2014 45 1 0 .411 2.16 5.16 .993 .545 .336 2.82 .569 -.097 1 30 NIH26A 1972 2014 43 1 0 .364 2.62 5.06 1.079 .491 .292 2.58 .594 -.055 1 31 NIH26B 1972 2014 43 1 0 .511 2.83 7.40 1.359 .620 .339 2.59 .452 -.039 1 32 NIH27A 1922 2014 93 4 4 .301 1.53 3.55 .816 .836 .246 2.81 .464 -.006 1 33 NIH27B 1922 2014 93 4 0 .397 1.51 3.48 .830 .891 .220 2.83 .514 -.025 1 34 NIH31A 1980 2013 34 1 0 .496 1.78 3.51 .726 .688 .272 2.57 .597 -.011 1 35 NIH31B 1980 2013 34 1 1 .309 1.68 3.40 .693 .669 .268 2.53 .580 -.020 1 36 NIH33A 1968 2014 47 1 1 .268 2.71 5.64 1.316 .762 .284 2.60 .528 -.029 1 37 NIH33B 1968 2014 47 1 1 .174 2.54 5.34 1.226 .807 .246 2.58 .479 .020 1 38 NIH36A 1970 2014 45 1 1 .277 1.65 5.32 1.151 .814 .325 2.93 .650 -.108 1 39 NIH36B 1970 2014 45 1 1 .197 1.67 5.38 1.176 .779 .330 2.97 .569 -.095 1 40 NIH37A 1912 1980 69 3 0 .471 1.86 3.68 .810 .632 .300 2.94 .647 -.056 1 41 NIH37B 1912 1969 58 2 0 .594 1.91 3.68 .819 .593 .283 2.96 .616 -.098 1 42 NIH46A 1970 2014 45 1 0 .489 2.37 5.44 1.177 .437 .436 2.61 .449 -.132 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2293 74 19 .409 1.85 8.76 1.064 .709 .318 2.97 .519 -.033