## 4 Results  
The IRD concentration varies between 24.75/g and 6483/g of dry sediments from 3.6 to 127.34 ka broadly divided into two periods (Figure 5b): The MIS5 (76-128 ka) in which the IRD is minimal (758/g); and the MIS2-4, high-frequency variable IRD with high IRD/g most of which are identified as the H-layers [1; 48].  
Figure 5: (**a**) \(\delta^{18}\)O in _N. pachyderma_ and the concentration of (**b**) ice-rafted detritus (IRD/g) and (**c**) planktonic foraminifera (Foram/g) per gram of dry sediments in core Hu90-08 (this study). The percentage of six dominant foraminifera is plotted as shown from (**d**–**i**). Note the \(y\)-axis for %_N. pachyderma_ is reversed (see detailed text). Downward filled-headed arrows represent the \({}^{14}\)C-AMS dates used to construct the stratigraphy between 6.34 and 42.90 ka, whereas the simple-headed arrows show the tie points as illustrated in Figure 3. Note the yellow bar represents the MIS4. Hx = Heinrich events; Cx = Cooling events.  
The total planktonic foraminiferal concentration varies from 6.1 to 20,018 shells/g (Figure 5c) between the cold MIS2-4 and warm MIS1 and 5 periods. The _Neogloboquadrina patchyderma, Neogloboquadrina incompta, Turborodulata quinqueloba, Globigerina bulloides_, and _Globorotalia inflata_ are the important planktonic foraminifers comprising nearly 68.53% of the foraminifers' concentration (Figure 5). Both white and pink varieties of _Globigerinoides ruber_ were also identified; however, due to the low concentration, i.e., 2.03%, it is not further discussed in detail in this study. The %_N. pachyderma_ varies from 1.34 to 85.53% (Figure 5d) during the MIS2-4 with an increasing trend from 21.76 to 84.93%, whereas it is almost stable with <5% throughout the MIS5. The %_N. incompta_ (Figure 5e) is high during the MIS5 and exhibits high-frequency variability in MIS3. Further, it appears that the low %_N. incompta_ mostly matches with the high %_N. pachyderma. The %_G. bulloides_ (Figure 5f) and %_G. inflata_ (Figure 5g) co-vary throughout the interval; however, their concentration remained relatively stable between 16 and 39 ka, although the concentration of the former is low compared to the latter and remained closed to the average of 5.45% (Figure 5g). The concentration of _T. quinqueloba_ (Figure 5i) is mostly low, with an average of 4.71% except for the intervals 19.5 and 30 ka, in which it varies from 3.31 to 19.55%.  
The \(\xi^{18}\)O in _N. pachyderma_ ranges from 1.41 to 3.74% (Figure 5a) with an average of 3.0%. The lightest \(\xi^{18}\)O were identified in the Holocene and MIS5a and 5e and the lighter peaks during the MIS2-3. The heaviest \(\xi^{18}\)O were found during MIS6 and MIS2, whereas the intermediate \(\xi^{18}\)O are found in MIS4.  
HI, H2, H4, and H5 layers were identified by the IRD/g and %_N. pachyderma_ peak and lighter \(\xi^{18}\)O in _N. pachyderma_ in core Hu90-08 (Figure 5). The identification of H-layers is constrained by the \({}^{14}\)C-AMS dates (Table 2). H11 was confidently identified at 128-134 ka by the high IRD/g and %_N. pachyderma_ peak [4; 25]. The minor IRD peak associated with the minor %_N. pachyderma_ peak at 86-88 ka tentatively correlated to the cooling event C21 (Figure 5) of the North Atlantic [27; 49].