10.1594/PANGAEA.993439Bhattacharya, TriptiTriptiBhattacharya0000-0002-5528-3760Syracuse UniversityFastovich, DavidDavidFastovichUniversity of GeorgiaMaupin, ChristopherChristopherMaupinTexas A&M UniversityThompson, AlexandraAlexandraThompsonSyracuse UniversityFeng, RanRanFengUniversity of ConnecticutZhu, JiangJiangZhu0000-0002-0908-5130NSF National Center for Atmospheric ResearchMcClymont, Erin LErin LMcClymont0000-0003-1562-8768Durham UniversityBong, HayoungHayoungBongNASA Goddard Institute for Space StudiesLeGrande, Allegra NAllegra NLeGrande0000-0002-5295-0062NASA Goddard Institute for Space StudiesDee, Sylvia GSylvia GDee0000-0002-2140-785XRice UniversityFiorella, RichardRichardFiorellaLos Alamos National LaboratoryPANGAEA2026carbon isotopecompound-specific biomarker isotopeshydrogen isotopeLeaf waxNorth Pacificwestern North AmericaEvent labelDepth, top/minDepth, bottom/maxSample repositorySample typen-Alkanoic acid C28, δDn-Alkanoic acid C28, δD, analytical errorn-Alkanoic acid C30, δDn-Alkanoic acid C30, δD, analytical errorn-Alkanoic acid C32, δDn-Alkanoic acid C32, δD, analytical errorn-Alkanoic acid C28, δ13Cn-Alkanoic acid C28, δ13C, analytical errorn-Alkanoic acid C30, δ13Cn-Alkanoic acid C30, δ13C, analytical errorn-Alkanoic acid C32, δ13Cn-Alkanoic acid C32, δ13C, analytical errorCarbon Preference IndexAverage chain lengthGravity corerGrabGas chromatography - isotope ratio mass spectrometry (GC-IRMS), Thermo Fisher Scientific, DELTA V PlusGas chromatography - Flame Ionization Detection (GC-FID), Thermo Scientific, Trace 13101961-08-02T00:00:00/2004-08-29T00:00:00Dataset443 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset consists of hydrogen (δD) and carbon isotope (δ13C) measurements of long-chain leaf wax n-acids from core tops (e.g. recent sediments) off the coast of western North America, spanning a latitudinal range of 20 to 60 degrees north. The dataset also includes chain length metrics like average chain length and carbon preference index. These data were collected to evaluate the degree of correlation between modern sedimentary leaf wax hydrogen isotopes and observed precipitation isotopes in a latitudinal range of 20 to 60 degrees north along the coast of western North America. Second, the data were collected to evaluate whether leaf wax hydrogen and carbon isotopes reflect large-scale gradients in ecological and climatological variables. Samples were processed by standard methods for biomarker extraction, purification and quantification, and isotopes were measured via gas chromatograph-isotope ratio mass spectrometry. Results of this study showed that a major transition in leaf wax hydrogen isotopic composition occurs at the latitude of the east Pacific storm track.-143.15-110.1923.1159.183Alfred P. Sloan Foundationhttps://doi.org/10.13039/100000879FG-2023-20259Understanding Pliocene HydroclimateNational Science Foundationhttps://doi.org/10.13039/100000001AGS-2303568Collaborative Research: Reducing Model Uncertainty by Improving Understanding of Pacific Meridional Climate Structure during Past Warm IntervalsNational Science Foundationhttps://doi.org/10.13039/100000001OCE-2237502Biomarker perspectives on the sensitivity of western North American precipitation to climate change