DOI: 10.25921/64rm-mc42
title: NOAA/WDS Paleoclimatology - Global Holocene Paleodust Database

description: Mineral dust plays an important role in the climate system by interacting with radiation, clouds, and biogeochemical cycles. In addition, natural archives show that the dust cycle experienced variability in the past in response to global and local climate change. The compilation of the DIRTMAP (Dust Indicators and Records from Terrestrial and MArine Palaeoenvironments) paleodust data sets in the last 2 decades provided a benchmark for paleoclimate models that include the dust cycle, following a time slice approach. We propose an innovative framework to organize a paleodust data set that builds on the positive experience of DIRTMAP and takes into account new scientific challenges by providing a concise and accessible data set of temporally resolved records of dust mass accumulation rates and particle grain size distributions. We consider data from ice cores, marine sediments, loess-paleosol sequences, lake sediments, and peat bogs for this compilation, with a temporal focus on the Holocene period. This global compilation allows the investigation of the potential, uncertainties, and confidence level of dust mass accumulation rate reconstructions and highlights the importance of dust particle size information for accurate and quantitative reconstructions of the dust cycle. After applying criteria that help to establish that the data considered represent changes in dust deposition, 45 paleodust records have been identified, with the highest density of dust deposition data occurring in the North Atlantic region. Although the temporal evolution of dust in the North Atlantic appears consistent across several cores and suggests that minimum dust fluxes are likely observed during the early to mid-Holocene period (6000-8000 years ago), the magnitude of dust fluxes in these observations is not fully consistent, suggesting that more work needs to be done to synthesize data sets for the Holocene. Based on the data compilation, we used the Community Earth System Model to estimate the mass balance of and variability in the global dust cycle during the Holocene, with dust loads ranging from 17.2 to 20.8 Tg between 2000 and 10 000 years ago and with a minimum in the early to mid-Holocene (6000-8000 years ago).
description: Mineral dust data (dust mass accumulation rates and particle grain size distributions) derived from a global set of 45 ice core, marine sediment, loess-paleosol, lake sediment, and peat bog records.  The site table below lists locations, confidence level, and presence/absence of grain size information. 

Site	Lon (0-360E)	Lat	Confidence	SizeData?
EDC	123.35	-75.1	high	yes
Vostok-BH7	106.8	-78.47	high	yes
GISP2	322.37	72.58	medium	no
EN06601-0038PG	339.502	4.918	high	no
EN06601-0021PG	339.375	4.233	high	no
EN06601-0029PG	340.238	2.46	high	no
RC24-12	348.583	-3.01	high	no
RC24-07	348.083	-1.333	high	no
RC24-01	346.35	0.55	high	no
V22-182	342.73	-0.53	high	no
V30-40	336.85	-0.2	high	no
OC437-07-GC27	349.37	30.88	medium	yes
OC437-07-GC37	344.882	26.816	high	yes
OC437-07-GC49	342.146	23.206	high	yes
OC437-07-GC66	342.14	19.944	medium	yes
OC437-07-GC68	342.718	19.363	high	yes
PS2498-1	345.18	-44.25	medium	no
RC27-42	59.8	16.5	high	no
93KL	64.22	23.58	medium	no
ODP138-848B-1H-1	249	-3	medium	no
ODP138-849A-1H-1	249	0.1833	medium	no
ODP138-850A-1H-1	249	1.3	medium	no
ODP138-851E-1H-1	249	2.7667	medium	no
ODP138-852A-1H-1	250	5.3	medium	no
ODP138-853B-1H-1	250	7.2167	medium	no
TT013-PC72	220	0	high	no
TT013-MC27	220	-3	high	no
TT013-MC69	220	2	high	no
TT013-MC97	220	0	high	no
TT013-MC19	220	-1.8	high	no
V28-203	180.58	0.95	high	no
V21-146	163	38	medium	yes
SO-14-08-05	118.38	-16.35	medium	no
E26.1	168.33	-40.28	medium	yes
Zagoskin_Lake	197.9	63	medium	yes
Chitina	215.62	61.54	medium	yes
Duowa	102.63	35.65	medium	no
Jiuzhoutai	103.75	36.07	medium	no
Jingyuan	104.6	36.35	medium	yes
Beiguoyuan	107.28	36.62	medium	yes
Xifeng	107.72	35.53	medium	yes
Luochuan	109.42	35.75	medium	no
Weinan	109.58	34.43	medium	yes
OWR	258.58	40.5	medium	yes
LRC	259.81	41.48	medium	yes